The density of an object is defined as mass per unit volume. mathematically we write that: d = m/v. rearrange this expression for: (a) m = ? (b) v = ?

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explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)

they are made of gases.

they have a spherical shape.

they make energy through fusion.