Answer the following based on the picture below. 1) How many electrons are present? 2) How many protons are present? 3) Which group does this
element belong? 4) Which period does this element belong? 5) What is the
electronic configuration?

please i need help​

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

Which formula can be used to calculate the molar mass of hydrogen peroxide

One of the hopes for solving the world's energy problem is to make use of the fusion reaction 21h +31h --> 42he + 10n + energy how much energy is released when 1 mol of deuterium is fused with 1 mol of tritium according to the above reaction? the masses of the atoms and the neutrons are as follows: 21h = 2.0140 amu 31h = 3.01605 amu 42he = 4.002603 amu 10n = 1.008665 amu. the speed of light is 2.9979 x 108 m/s.