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Which of the following elements commonly forms covalent bond?

Which chemical bond involves sharing a pair of electrons between atoms in a molecules.

A negatively charged ion is a

Strong electrostatic forces of attraction ---------- in the giant ionic lattice.

Ionic compounds have regular structures ( giant ionic lattices) in which there are strong electrostatic forces between positive and ------------ ions.

What would be the formula of calcium fluoride

What would be the charge on a calcium atom loses two electrons.

-------- is an atom or molecule with a positive or negative charge.

A metal atom that loses an electron will have a ---------- .

An -------- is a substance with a different number of protons and electrons

Which subatomic particle orbits the nucleus in shells?

Which subatomic particle orbits the nucleus in shell?

How many Valence electrons can fit in the first energy level?

What is the atomic number.?

The electronic structure of nitrogen is ----- . ( atomic number 14 , mass number 28)

The electronic structure of Beryllium is -------( atomic number 4, mass number-9 )