Answer:
1. Periods
2. Groups of families
3. the statement is true about Periodic law
4. metals
5.transition metals
6.atomic radius
7. cations
8. electrons
9. electronegativity of the atom
10. ionization energy
Explanation:
1. horizontal row in the periodic table____are called Periods
2. vertical column in the periodic table____ are called Groups of families
3. A repetition of properties occurs when elements are arranged in order of increasing atomic number.____ True about Periodic Law (most elements that fall within the same families has similar properties)
4. type of element that is a good conductor of heat and electric current____ are metals that are found in group 1 and 2 of the periodic table Boron, tin, silver, Zinc, Alluminium, Germanium, Pollonium, antimony, e.t.c
5. type of element characterized by the presence of electrons in the dorbital____are called transition metals
6. one-half the distance between the nuclei of two atoms when the atoms are joined____ are called atomic radius
7. type of ion formed by Group 2A elements____are Cations
8. subatomic particles that are transferred to form positive and negative ions____ are called electrons
9. ability of an atom to attract electrons when the atom is in a compound____ is called electronegativity of the atom
10. energy required to remove an electron from an atom is called ionization energy
