Question

Write the symbol for an atom or ion with:

a. one electron, one proton, and two neutrons.

b. seven electrons, eight protons, and ten neutrons.

Short answer

a. The atom is${}^{3}H$.

b. The ion is${}^{18}{O}^{+}$.

Step-by-step solution

Part (a) step 1: Given information

We need to find the symbol for an atom or ion with one electron, one proton, and two neutrons.

Part (a) step 2: Explanation

The element is Hydrogen and the symbol is${}^{3}H$.

Part (b) step 1: Given information

We need to find the symbol for an atom or ion with seven electrons, eight protons, and ten neutrons.

Part (b) step 2: Explanation

As it has $8$protons the element is Oxygen. and the electron is less than proton it is a positive ion. The symbol is ${}^{18}{O}^{+}$.