An atom of element X has an atomic number of 119 and a mass number of 319. How many protons does it have?

Calculate the relative formula mass of calcium carbonate, CaCO3. (relative atomic masses: C = 12, O = 16, Ca = 40)

Explain why the pH of a hydrochloric acid increases when pure water is added

Why is iron used in the Haber process?

Rauda wants to separate 2 liquids. Liquid A has a boiling point of 65C and liquid B has a boiling poit of 95C. She sets up a fractional distillation. Which liquid is collected first?

Name of this structure?

Give an example of an alkali metal

How many electrons are there in a chloride ion (Cl-)?

An atom of element X has an atomic number of 119 and a mass number of 319. How many neutrons does it have?

what is the word equation for the following

Generally, what is the ionic charge on group 6 ions?

the horizontal lines on the periodic table are called