explain that substances which have covalent bonding can be elements (e. g. H2, O2, N2, C) or compounds (e. g. CH4, CO2, SiO2).

Explanation:

yes, covalent bond can be formed by an element now, from the eg N2 molecules which is formed covalent bond...

we know , the At.no. of N = 7.. the we can find out covalent bond or not

yes, covalent bond can be formed by compound now, from the eg CH4 compound which is formed covalent bond...

we know , the At.no. of C = 6, H = 1 .. the we can find out covalent bond or not

if u want more clearly then told me

And follow me..❤️

hope this

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)

the atomic mass is the bottom number on the element.

-steel jelly