1) What is an atom?
The smallest part of an element that still has its properties.
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| Term | Definition |
|---|---|
1) What is an atom? | The smallest part of an element that still has its properties. |
2) What are the 3 subatomic particles? | Protons, neutrons, and electrons |
3) Where are protons and neutrons found? | In the nucleus of the atom |
4) Where are electrons found? | In energy levels (shells) around the nucleus |
5) What charge does a proton have? | Positive (+1) |
6) What charge does a neutron have? | No charge (neutral) |
7) What charge does an electron have? | Negative (-1) |
8) What is the atomic number? | The number of protons in an atom. |
9) In a neutral atom, what does the atomic number also equal? | The number of electrons |
10) What is the mass number? | The total number of protons + neutrons |
11) How do you find neutrons? | Mass number − Atomic number |
12) What are isotopes? | Atoms of the same element with different numbers of neutrons. |
13)How many electrons fit in the first shell? | 2 electrons |
14)How many electrons fit in the second shell? | 8 electrons |
15)What happens when an atom loses electrons? | It becomes a positive ion. |
16)What happens when an atom gains electrons? | It becomes a negative ion. |