Question

Part A 

Express your answer as a chemical symbol or as an ion.

 Part B 

Express your answer as a chemical symbol or as an ion. 

Part C 

Express your answer as a chemical symbol or as an ion.

Part D 

Express your answer as a chemical symbol or as an ion.

Answer 1

Part A

The ion is having 3 protons, 2 electrons and 4 neutrons.

The atomic number of an element is the total number of protons in the atom. Since here the number of protons are 3, the atomic number of the element will be 3 and the element is lithium. Mass number of an element is the sum of atomic number and number of neutrons. Here 4+3=7 will be the mass number. The number of electrons in an element is equal to the number of protons. Here the number of electrons is 2, which indicates that one electron is missing, and its an ion.

${\color{Red} Li^{+}}$

Part B

The ion is having 1 protons, 0 electrons.

The atomic number of an element is the total number of protons in the atom. Since here the number of protons are 1, the atomic number of the element will be 1 and the element is hydrogen. The number of electrons in an element is equal to the number of protons. Here the number of electrons is 0, which indicates that one electron is missing, and its an ion.

${\color{Red} H^{+}}$

Part C

The ion is having 3 protons, 3 electrons and 4 neutrons.

The atomic number of an element is the total number of protons in the atom. Since here the number of protons are 3, the atomic number of the element will be 3 and the element is lithium. Mass number of an element is the sum of atomic number and number of neutrons. Here 4+3=7 will be the mass number. The number of electrons in an element is equal to the number of protons. Here the number of electrons is 3. The chemical symbol of the element is,

${\color{Red} ^{7}_{3}Li}$

Part D

The ion is having 7 protons, 10 electron and 8 neutrons.

The atomic number of an element is the total number of protons in the atom. Since here the number of protons are 7, the atomic number of the element will be 7 and the element is nitrogen.Mass number of an element is the sum of atomic number and number of neutrons. Here 7+8=15will be the mass number. The number of electrons in an element is equal to the number of protons. Here the number of electrons is 10, which indicates that 3 electrons are more. Thus it is an ion,

${\color{Red} N^{3-}}$