Finding sum of the coefficients

Question

Assignment:

Question 1. Atoms of the same element with different mass numbers are called:

• nucleons
• neutrons
• allotropes
• chemical families
• isotopes

Question 2. Which is the correct formula for copper(II) phosphate?

• Cu₂PO₄
• Cu3(PO₄)₂
• Cu₂PO₃
• Cu(PO₄)₂
• Cu(PO₃)₂

Question 3. When a chemical equation is balanced, it will have a set of whole number coefficients which cannot be reduced to smaller whole numbers. When the following chemical equation is balanced, what is the sum of the coefficients (do not forget to add in the coefficient one if it occurs)?
___ Al + ___ H₂SO₄ ___ Al₂(SO₄)₃ + ___ H₂

• 3
• 5
• 6
• 9
• 12

Question 4. CH₃NH₂ represents a/an

• alcohol
• alkyne
• amine
• ester

Question 5. How many protons and electrons are present in Bromine?

• 80 protons, 35 electrons
• 45 protons, 35 electrons
• 35 protons, 45 electrons
• 35 protons, 35 electrons