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6. What is a compound?
- A substance that consists of two or more types of elements
- A substance that consists of two or more mixtures
- A substance that consists of of one type of element
7. What is a base?
- A substance that increases the rate of reaction
- A substance that reacts with acids to neutralise them
- A substance that reacts with alkalis to neutralise them
8. What is an atomic number?
- The number of shells an atom has
- The number of protons in an atom's nucleus
- The number of electrons in an atom's nucleus
- The number of neutrons in an atom's nucleus
9. What is the pH of an alkali
10. What is an element?
- A substance that contains one type of atom
- A substance that contains two or more types of atoms
11. What is the charge of a proton?
12. What is a mixture?
- A mixture is two or more substances not chemically bonded together
- A mixture is two or more substances chemically bonded together
13. What is a mass number?
- The sum of neutrons and electrons in an atom
- The sum of protons and neutrons in an atom
- The sum of protons and electrons in an atom
14. What is the charge of a neutron?
15. What is a diatomic molecule?
- A molecule that contains two or more atoms
- A molecule that contains two atoms
- A molecule that contains one atoms
16. What is a covalent bond?
- A bond created between atom by sharing a pair of electrons
- A bond created between atoms that have the same number of electrons
- A bond created between atoms that have the same number of electrons
17. What is the pH of an acid?
18. What is the charge of an electron?
19. What is an isotope?
- Isotopes are atoms that have the same number of protons but differing numbers of neutrons
- Isotopes are atoms that have the same number of neutrons but differing numbers of electrons
- Isotopes are atoms that have the same number of neutrons but differing numbers of protons
- Isotopes are atoms that have the same number of protons as electrons
20. What is mass?
- Mass is the measure of the amount of a substance
- Mass is the amount of different types of elements in a compound