mason Hanna week 5

4. in nuclear physics, the sum of the numbers of protons and neutrons present in the nucleus of an atom
7. in chemistry, a column in the periodic table of the chemical elements
8. the number of protons in the nucleus of an atom; the atomic number is the same for all atoms of an element
10. a substance that cannot be separated or broken down into simpler substances by chemical means

1. a subatomic particles that has a positive charge and that is located in the nucleus is the atomic number, which determines the identity of an element
2. the smallest unit of an element that maintains the properties of that element
3. an arrangement of the elements in order of their atomic numbers such that elements with similar column, or group
5. a subatomic particle that has a negative charge
6. a subatomic particles that has no charge and that is located in the nucleus of an atom
9. The periodic table is arranged in order of atomic number A period is a horizontal row of the periodic table group is a vertical row of the periodic table