Which has the higher atomic number?

Exercise and reference answers

Questions

1. A

   Sodium (Na)

   B

   Carbon (C)

   Higher value

   Sodium (Na)

2. A

   Oxygen (O)

   B

   Iron (Fe)

   Higher value

   Iron (Fe)

3. A

   Hydrogen (H)

   B

   Helium (He)

   Higher value

   Helium (He)

4. A

   Calcium (Ca)

   B

   Potassium (K)

   Higher value

   Calcium (Ca)