Is the only element in group 1 on the periodic table that forms covalent bonds.
a) hydrogen
b) lithium
c) potassium
d) sodium

A) hydrogen

Explanation: Covalent bonds are formed by sharing of electrons whereas ionic bonds are formed by transfer of electrons.

Hydrogen is an element with atomic number of 1 and thus contain 1 electron.

It can only share electrons to attain stable configuration as on losing the electron it wont exist.

Lithium is an element with atomic number of 3 and thus contain 3 electrons.

It can lose 1 electron to attain stable configuration.

Potassium is an element with atomic number of 19 and thus contain 19 electrons.

It can lose 1 electron to attain stable configuration.

Sodium is an element with atomic number of 11 and thus contain 11 electrons.

It can lose 1 electron to attain stable configuration.

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.