Question

true or false

1. atoms are mostly empty space.
2. each element has a specific number of protons in the nucleus.
3. electrons are the largest particles in an atom.
4. a branch of chemistry is named after oxygen.
5. heat is a form of matter.
6. neutrons are negatively charged.
7. a quark is a small particle that makes up protons & neutrons.
8. the atomic number tells you the number of electrons in the nucleus of an atom.
9. energy is anything that has mass & takes up space.
10. protons & electrons make up most of the mass of an atom.

Explanation:

1. Atoms have a tiny nucleus with electrons in vast - empty space around, so it's true.
2. The number of protons in the nucleus defines an element, so it's true.
3. Electrons are much smaller than protons and neutrons, so it's false.
4. There is no branch of chemistry named after oxygen, so it's false.
5. Heat is a form of energy, not matter, so it's false.
6. Neutrons are neutral, not negatively - charged, so it's false.
7. Quarks make up protons and neutrons, so it's true.
8. The atomic number is the number of protons, not electrons in the nucleus (electrons are outside the nucleus), so it's false.
9. Matter has mass and takes up space, energy doesn't in the same sense, so it's false.
10. Protons and neutrons make up most of an atom's mass, not electrons, so it's false.

Answer:

1. T
2. T
3. F
4. F
5. F
6. F
7. T
8. F
9. F
10. F