sciencehelp

Anyone wants to correct me? lol

Hello, After all of the help I have gotten from you guys, The results that I have got is here. 1. How many protons should be added to the nucler of oxygen atoms so the resulting gas will flow red when an electric current flows through it? A. 1 B. Protons have to be subtracted not added.* C. 4 D. 2 E. 3 2. One element is distinguished from another by number of A. Protons* B. Neutrons C. Electrons D. All of the above. 3. Which of these atoms has the greatest amount of electrical charge in its nucleus? A. Carbon B. Gold C. Helium D. Uranium* E. Iron 4. Which of these atoms has the greatest number of electrons? A. Helium B. Uranium C. Iron D. Gold*( not sure about this) E. Carbon 5. Which of the following are electrically neutral? A. Neutron* B. Electron C. Proton D. All of the above E. None of the above 6. Which is the smallest particle listed below? A. A molecule B. A proton C. An atom D. A neutron E. A quark* 7. Solid matter is mostly empty space. The reason solids don't fall through another is because A. Of gravitational forces B. Of nuclear forces C. Of electrical forces* D. Atoms are constantly vibrating. Even at absolute zero E. None of these 8. In an eletrically nuetral atom, the number of protons in the necleus is balanced by an equal number of A. Quarks B. Neutron C. Orbital electrons* D. All of these E. None of these 9. What makes an element distinct? A. The number of electrons B. The number of neutrons C. The number of protons* D. The total mass of all the particles E. None of these 10. The air in a normal room has? A. Mass B. Energy C. Weight D. All of these* E. None of these 11. In a closed bottle are a certain number of hydrogen atoms. In an identical closed bottle at the same temperature and internal pressure are a certain number of nitrogen atoms. The bottle with the greatest number of atom is the one containing A. Nitrogen B. Both the same C. Hydrogen* 12. If two protons are removed from an oxygen nucleus, the result is A. Nitrogen B. Neon C. Carbon* D. Helium E. None of these 13. If a pair of helium nuclei are fused together, the result is A. Lithium B. Beryllium* C. Heavy helium D. All of these E. None of these 14. If we doubled the magnifying power of the most powerful optical microscope in the world, we would A. Be abke to see indiviual atoms B. Still not be able to see an atom* C. Be able to photograph indiviual atoms even though we couldn't see them. 15. In the periodic table, the metallord are found A. Vertically to the left hand side B. Vertically to the far right hand side*( This is a tricky question because it can also be C) C. Diagonally just right of the center D. Horizontally below the main body 16. Browman motion has to do with the A. Rhythmic movement of Brownians B. Atomic vibration C. Random motions of atoms and molecules.* D. Size of atoms 17. The reason a granite block is mostly empty space is because of the atoms in the granite are A. Not as close together as they could be B. In perpetual motion C. Invisable D. Mostly empty space themselves* E. Held together by electrical forces 18. Which of these atom has the most mass? A. Lead B. Hydrogen C. Iron D. Uranium* E. All have the same mass 19. To change mercury into gold, a pair of protons must be A. Added to the mercury nucleus B. Removed from the mercury nucleus C. Both of these D. Neither of these* 20. Compared to the atoms that make up the body of an elderly person, the atoms that make up the body of a newborn baby are A. The same age* B. Newer C. Actually older 21. The inner transition metals are not listed in the main body of periodic table because they A. Have properties that are unlike those of other atomic groups* B. Have masses that are much greater C. Are all radioactive D. Are set in the 8th and 9th period 22. Transition metals are primilary used A. As pigmentation in paints B. For transforming metalloid into metals C. For structural purpose* D. As fuel for nuclear reactors 23. Nucler of atoms that make up a newvborn baby were made in A. The food the mother eat before giving birth B. The mother's womb C. Ancient stars* D. The earth E. None of these 24. How many different elements are in the water molecule? A. 4 B. 2* C. 1 D. 3 E. None of these 25. What is the total number of protons and neutrons are in a water molecule A. 10 B. 15 C. 12 D. 18* E. None of these 26. Compared to the energy it takes to seperate oxygen and hydrogen from water, the amount of energy given off when they recombine is A. The same* B. More C. Less 27. Which type of solid would gave the greatest tendecy to shatter upon impact with a hammer A. A metalloid B. An inner transition element C. A nonmetal* D. A metal 28. A radioactive isotope of strontium, SR, is especially dangerous to humans because if its tends to accumulate in the bone marrow tissues, Hiw does this relate to the organization of the periodic table? A. Strontium is over twice as massive as calcium B. Compared to calcium, strontium has an additional 18 electrons and cause harm C. Strontium and calcium are in the same atomic group, hence they have similar physical and chemical properties.* D.Strontium and calcium are in the same atomic period, hence they have similar physical and chemical properties. 29. If two protons are added to an oxygen nucleus, the result is A. Nitrogen B. Sodium C. Fluorine D. Heavy oxygen E. Neon* 30. If one neutron is added to a helium nucleus, the result is A. hydrogen B. boron c. beryvillium D. helium* e. lithium 31. there are about as many atoms of air in your lungs at any momeny as there are breaths in air in the atmosphere of A. the whole world* b. a large city c. a large auditorium d. the u.s e. none of these 32. assuming all the atoms exhaled by julius caesar in his last dying breaths are still in the atmosphere, then we probably breathe one of those atoms with each A. single breath B. day* 33. which has the greatest number of protons in its nucleus? a. silver b. lead* c. gold d. mercury 34. an atom has a. structure b. mass c. energy d. all of these* e. none of these 35. atoms heavier than hydrogen were made by a. nuclear fusion* b. radioactivity c. phtosynthesis d. radiant energy conversion e. none of these 36. if an element of atomic number 118 is ever synthesized, it would be a. a gas at room temperature b. radioactive c. chemically inert d. all of these* 37. which of the following statement is true? a. there are thousands of different kinds of atoms that account for a wide variety of substances b. there are only about 100 diffrent kind of atoms that combine to form all substances* c. atoms are so small that there is no way we can photograph them d. an atom is the smallest particle know to exist e. none of these are true 38. compared to the mass of a hydrogen atom, the mass of an oxygen atom is A.16 times greater* b. appreciable more than 16 times greater c. 8 times greater d. 12 times greater 39 which of tjese forces determines the chemical properties of an atom? a. electrical force*(This is another tricky 1 .. this can be either A or B) b. nuclear force c. gravitational force d. friction force e. none of these

Which 1 is it? I am pretty sure its electrical force though... can anyone verifty this?

Thx for the help guys!

Hello, I really need help with my homework. I really have a hard time with science and I try really hard. Can someone check if my answers are right? I tried the best of my ability to answer these so please help me out. the star means the answer i think it is. 1. How many protons should be added to the nucler of oxygen atoms so the resulting gas will flow red when an electric current flows through it? A. 1 B. Protons have to be subtracted not added.* C. 4 D. 2 E. 3 2. One element is distinguished from another by number of A. Protons B. Neutrons C. Electrons D. All of the above.* 3. Which of these atoms has the greatest amount of electrical charge in its nucleus? A. Carbon B. Gold C. Helium D. Uranium* E. Iron 4. Which of these atoms has the greatest number of electrons? A. Helium B. Uranium C. Iron D. Gold* E. Carbon 5. Which of the following are electrically neutral? A. Neutron* B. Electron C. Proton D. All of the above E. None of the above 6. Which is the smallest particle listed below? A. A molecule* B. A proton C. An atom D. A neutron E. A quark 7. Solid matter is mostly empty space. The reason solids don't fall through another is because A. Of gravitational forces B. Of nuclear forces C. Of electrical forces* D. Atoms are constantly vibrating. Even at absolute zero E. None of these 8. In an eletrically nuetral atom, the number of protons in the necleus is balanced by an equal number of A. Quarks B. Neutron* C. Orbital electrons D. All of these E. None of these 9. What makes an element distinct? A. The number of electrons B. The number of neutrons C. The number of protons D. The total mass of all the particles * E. None of these 10. The air in a normal room has? A. Mass B. Energy C. Weight D. All of these* E. None of these 11. In a closed bottle are a certain number of hydrogen atoms. In an identical closed bottle at the same temperature and internal pressure are a certain number of nitrogen atoms. The bottle with the greatest number of atom is the one containing A. Nitrogen* B. Both the same C. Hydrogen 12. If two protons are removed from an oxygen nucleus, the result is A. Nitrogen B. Neon C. Carbon D. Helium E. None of these* 13. If a pair of helium nuclei are fused together, the result is A. Lithium* B. Beryllium C. Heavy helium D. All of these E. None of these 14. If we doubled the magnifying power of the most powerful optical microscope in the world, we would A. Be abke to see indiviual atoms B. Still not be able to see an atom C. Be able to photograph indiviual atoms even though we couldn't see them.* 15. In the periodic table, the metallord are found A. Vertically to the left hand side B. Vertically to the far right hand side* C. Diagonally just right of the center D. Horizontally below the main body 16. Browman motion has to do with the A. Rhythmic movement of Brownians* B. Atomic vibration C. Random motions of atoms and molecules. D. Size of atoms 17. The reason a granite block is mostly empty space is because of the atoms in the granite are A. Not as close together as they could be B. In perpetual motion C. Invisable D. Mostly empty space themselves E. Held together by electrical forces* 18. Which of these atom has the most mass? A. Lead* B. Hydrogen C. Iron D. Uranium E. All have the same mass 19. To change mercury into gold, a pair of protons must be A. Added to the mercury nucleus B. Removed from the mercury nucleus* C. Both of these D. Neither of these 20. Compared to the atoms that make up the body of an elderly person, the atoms that make up the body of a newborn baby are A. The same age* B. Newer C. Actually older 21. The inner transition metals are not listed in the main body of periodic table because they A. Have properties that are unlike those of other atomic groups B. Have masses that are much greater C. Are all radioactive D. Are set in the 8th and 9th period* 22. Transition metals are primilary used A. As pigmentation in paints B. For transforming metalloid into metals C. For structural purpose D. As fuel for nuclear reactors* 23. Nucler of atoms that make up a newvborn baby were made in A. The food the mother eat before giving birth B. The mother's womb C. Ancient stars D. The earth* E. None of these 24. How many different elements are in the water molecule? A. 4* B. 2 C. 1 D. 3 E. None of these 25. What is the total number of protons and neutrons are in a water molecule A. 10 B. 15 C. 12* D. 18 E. None of these 26. Compared to the energy it takes to seperate oxygen and hydrogen from water, the amount of energy given off when they recombine is A. The same* B. More C. Less 27. Which type of solid would gave the greatest tendecy to shatter upon impact with a hammer A. A metalloid B. An inner transition element C. A nonmetal* D. A metal 28. A radioactive isotope of strontium, SR, is especially dangerous to humans because if its tends to accumulate in the bone marrow tissues, Hiw does this relate to the organization of the periodic table? A. Strontium is over twice as massive as calcium B. Compared to calcium, strontium has an additional 18 electrons and cause harm C. Strontium and calcium are in the same atomic group, hence they have similar physical and chemical properties.* D.Strontium and calcium are in the same atomic period, hence they have similar physical and chemical properties. 29. If two protons are added to an oxygen nucleus, the result is A. Nitrogen* B. Sodium C. Fluorine D. Heavy oxygen E. Neon 30. If one neutron is added to a helium nucleus, the result is A. hydrogen B. boron c. beryvillium * D. helium e. lithium 31. there are about as many atoms of air in your lungs at any momeny as there are breaths in air in the atmosphere of A. the whole world* b. a large city c. a large auditorium d. the u.s e. none of these 32. assuming all the atoms exhaled by julius caesar in his last dying breaths are still in the atmosphere, then we probably breathe one of those atoms with each A. single breath* B. day 33. which has the greatest number of protons in its nucleus? a. silver b. lead c. gold d. mercury* 34. an atom has a. structure b. mass c. energy d. all of these* e. none of these 35. atoms heavier than hydrogen were made by a. nuclear fusion* b. radioactivity c. phtosynthesis d. radiant energy conversion e. none of these 36. if an element of atomic number 118 is ever synthesized, it would be a. a gas at room temperature b. radioactive c. chemically inert d. all of these* 37. which of the following statement is true? a. there are thousands of different kinds of atoms that account for a wide variety of substances* b. there are only about 100 diffrent kind of atoms that combine to form all substances c. atoms are so small that there is no way we can photograph them d. an atom is the smallest particle know to exist e. none of these are true 38. compared to the mass of a hydrogen atom, the mass of an oxygen atom is 1. 16 times greater b. appreciable more than 16 times greater* c. 8 times greater d. 12 times greater 39 which of tjese forces determines the chemical properties of an atom? a. electrical force b. nuclear force c. gravitational force d. friction force e. none of these*

yeah, can you give me a problem to solve before the test? i really need help in 30mins thats when i go to school. please help me. I want an example before i go.

I was wondering if anyone knows how to calculate joels. and kinetic energy and stuff. I really need help. can any 1 teach me how to do it?