Question

1. give the symbol of and the number of electrons in a neutral atom of: uranium ____________ boron __________ chlorine __________ atom of: iodine __________ xenon ____________

Explanation:

Step1: Recall element symbols and electron - count rule

In a neutral atom, the number of electrons is equal to the atomic number. Use the periodic table to find element symbols and atomic numbers.

Step2: For uranium

The symbol of uranium is U. Its atomic number is 92, so the number of electrons in a neutral uranium atom is 92.

Step3: For iodine

The symbol of iodine is I. Its atomic number is 53, so the number of electrons in a neutral iodine atom is 53.

Step4: For xenon

The symbol of xenon is Xe. Its atomic number is 54, so the number of electrons in a neutral xenon atom is 54.

Step5: For boron

The symbol of boron is B. Its atomic number is 5, so the number of electrons in a neutral boron atom is 5.

Step6: For chlorine

The symbol of chlorine is Cl. Its atomic number is 17, so the number of electrons in a neutral chlorine atom is 17.

Answer:

Uranium: U, 92
Iodine: I, 53
Xenon: Xe, 54
Boron: B, 5
Chlorine: Cl, 17