Helium 2 He 27 4.0026 2. 1. What is the atomic mass of Helium? Using that, determine the number of neutrons in a Helium atom. Atomic Mass= Neutrons=

2.What is the atomic number of Helium? What subatomic particle does it refer to? *Remember APE MAN! He (Helium) Atomic Number= Atomic # is equal to the # of HA

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.

Write a balanced equation showing the formation of copper (ii) nitrite from its elements

Using the periodic table, complete the following. element: hydrogen symbol: h₂ molecular weight: g mass of one mole: g/mol