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4.1 Atomic Theory and Bonding
BC Science 10
www.bcscience.com
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1. _____ diagrams show the arrangement of protons, neutrons, and electrons in atoms and also in ions.
2. These are formed from atoms that have lost or gained electrons.
3. _____ diagrams show the arrangement of bonds within compounds.
4. A pure substance that is composed of two or more atoms combined in a specific way.
5. The smallest particle of any element that retains the properties of the element.
6. _____ changes are changes in the ways the atoms and molecules in a pure substance are arranged and interconnected.
7. _____ particles are the particles that make up an atom.
8. Protons and neutrons are held tightly together at the centre of the
atom in a tiny region called the _____.
9. Most of the volume of an atom is the region occupied by its _____.
10. The simplest possible nucleus is found in the element hydrogen, which contains only one _____.
11. In heavier atoms, extra _____ help to make the nucleus stable by keeping the protons as far apart as possible.
12. _____ _____ is simply found by counting the number of protons.
13. The nuclear charge is the same as the _____ _____.
14. In the periodic table, each row is also called a _____.
15. _____ metals include familiar elements such as iron, nickel, copper, silver, and gold.
16. Some metals are _____, which means they can form ions in more than one way, depending on the situation.
17. The two elements in period 1 of the periodic table, hydrogen and helium, have a single occupied _____.
18. In terms of atomic stability, lower energy states are more _____.
19. In _____ bonding, one or more electrons transfers from each atom of the metal to each atom of the non-metal.
20. In _____ bonding, atoms overlap slightly, and one unpaired electron from each atom will pair together.
21. A pair of electrons in the valence shell that is not used in bonding is sometimes called a _____ _____.
22. A _____ molecule is a pair of atoms of the same element that are joined by covalent bonds.