Helium (he) has an atomic number of 2. it is chemically stable because it

What forces pushes protons in the nucleus apart

Which chemical bonds are found within water molecules? a. ionic b. inert d. hydrogen

Sodium loses one electron. What is the change?

Scientists created the first geologic column by determining the relative ages of sedimentary rock in A) one chosen area B) the area where life began C) North America D) areas all over the world

A large body in space that orbits a star and does not produce light of its own

Which metal is the most abundant in the Earth's crust? copper (Cu) aluminum (Al) iron (Fe) zinc (Zn)

What is the empirical formula of a compound that is 56.95% cu, 14.37% s, and 28.68% o?

The solubility of carbon dioxide gas in water can be increased by

How many sodium ions are there in 85 g of sodium oxide?

When sodium metal is added to water, the following reaction occurs: 2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (g) What is the theoretical number of moles of hydrogen gas should be produced when 0.068 mol of sodium metal reacts? a. 1.0 mol H2 b. 0.