An element has 4 protons, 5 neutrons, and 4 electrons. what is the atomic mass of the element?

4
5
8
9

Find the mass, in grams, of 5.00*10^23 molecules of f2

Can someone check my work 98 5.05 acids and bases for this assignment you will be comparing acids and bases. the chart below will you organize the information needed: acids bases chemical properties (2) deodorant detergent vinger dish soap physical properties (2) orange juice toilet cleaner drain cleaner window cleaner ph level acid ph goes from 0-4 bases ph goes from 10-14 examples around you (2) vinger coffee lemon juice dark chocolate

What is the chemical formula for a compound between li and br? libr li2br libr2 libr3