5.05 elements and compounds totd

Which one has more than one type of atom in it?

• Element
• Compound 

When two or more different elements chemically combine, a __________________________ is formed.

• element

• compound

• mixture

• solution

Copper oxide contains 1 copper (Cu) atom and 1 oxygen (O) atom. The formula of copper oxide is

• CuO

• Cu₂O

• CuO₂

Magnesium chloride has 1 magnesium (Mg) atom and 2 chlorine (Cl) atoms. What is the chemical formula of Magnesium chloride?

• MgCl

• MgCl₂

• MgC

• MgC_2

Alanine is an amino acid with formula C₃H₇NO_2. How many atoms in all are in each molecule of alanine?

• 3

• 7

• 12

• 13