Question

directions: use a periodic table to find the information asked for below: 1. what is the atomic number of: calcium__ iron gold uranium 2. what is the atomic mass of: calcium iron uranium copper 3. how many protons do the following have? calcium__

Explanation:

Step1: Find calcium on periodic table

Atomic number of calcium is 20.

Step2: Find iron on periodic table

Atomic number of iron is 26.

Step3: Find gold on periodic table

Atomic number of gold is 79.

Step4: Find uranium on periodic table

Atomic number of uranium is 92.

Step5: Find atomic mass of calcium on periodic table

Atomic mass of calcium is approximately 40.08.

Step6: Find atomic mass of iron on periodic table

Atomic mass of iron is approximately 55.85.

Step7: Find atomic mass of uranium on periodic table

Atomic mass of uranium is approximately 238.03.

Step8: Find atomic mass of copper on periodic table

Atomic mass of copper is approximately 63.55.

Step9: Recall relationship between atomic number and protons

Number of protons = atomic number. So calcium has 20 protons.

Answer:

1. Calcium: 20, Iron: 26, Gold: 79, Uranium: 92
2. Calcium: 40.08, Iron: 55.85, Uranium: 238.03, Copper: 63.55
3. Calcium: 20