Chemistry

5. process that involves removal(loss) of electron
7. positively charged particle
11. branch of science that deals with the study of the nature of matter, its composition, occurrence, isolation, methods of preparation, properties and uses.
16. elements belongs to groups 1A to 7A
18. type of bond is formed by the mutual sharing of pair of electrons between two atoms each atom supplying equal number of electrons for sharing
20. a negatively charged particle.
21. unit of measurement used in chemistry to express amounts of a chemical substance

1. _____ number is the number protons present in the nucleus of an atom or number of electrons revolving around the nucleus in an atom
2. chemical _______ may be defined as an attraction between the two atoms in a molecule
3. electrons present in the outer most orbit
4. atoms of different elements having the same mass number but different atomic number.
6. the central part of an atom consists of protons and neutrons
8. process that involves addition(gain) of electrons
9. _______ number of an element is given by the total number of protons and neutrons present in the nucleus of an atom.
10. Electron ____ notation represents the distribution of valence electrons of an element
12. atoms of the same elements having the same atomic number but different mass number
13. ______metals are elements that belong to 1B to 8B
14. the smallest form of a chemical particle that retains the properties of the particle
15. _______ formula of the compound shows the smallest whole number of atoms of each element present.
17. type of bond is formed as a result of the complete transfer of one or more electrons from one atom to other
19. neutral particle