Across
- 2. chemical elements arranged in order of atomic number usually in rows so that elements that they show in vertical column's
- 8. is the tendency for an atom of a given chemical element to attract shared electrons when forming a chemical bond.
- 10. a chemical substance composed of many identical molecules composed of atoms from more than one element held together by chemical bonds.
- 12. a column of elements in the periodic table of the chemical elements.
- 14. is one of two stable isotopes of hydrogen.
- 15. The horizontal rows of the periodic table.
- 16. is a subatomic particle, symbol p or p⁺ , with a positive electric charge.
Down
- 1. an analytical technique that is used to measure the mass-to-charge ratio of ions.
- 3. is the minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule.
- 4. is a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei.
- 5. are two or more types of atoms that have the same atomic number and position in the periodic table.
- 6. is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons.
- 7. is a subatomic particle, symbol n or n⁰, which has a neutral charge.
- 9. a negatively charged ion.
- 11. a positively charged ion.
- 13. is a subatomic particle, whose electric charge is negative one elementary charge.