Question

1. how many electrons do the following have? gold__ iron copper uranium__

Explanation:

Step1: Recall atomic number property

The number of electrons in a neutral atom is equal to its atomic number.

Step2: Find atomic number of gold

The atomic number of gold (Au) is 79, so it has 79 electrons.

Step3: Find atomic number of iron

The atomic number of iron (Fe) is 26, so it has 26 electrons.

Step4: Find atomic number of copper

The atomic number of copper (Cu) is 29, so it has 29 electrons.

Step5: Find atomic number of uranium

The atomic number of uranium (U) is 92, so it has 92 electrons.

Answer:

Gold: 79
Iron: 26
Copper: 29
Uranium: 92