Questions: Match the following to the correct atomic number Atomic number: 17 Atomic number 18 Atomic number 19 Atomic number 20 An isotope with 18 neutrons and a mass number of 35 An isotope with a mass number of 40 and 20 neutrons

Match the following to the correct atomic number

Atomic number: 17

Atomic number 18

Atomic number 19

Atomic number 20

An isotope with 18 neutrons and a mass number of 35

An isotope with a mass number of 40 and 20 neutrons

Transcript text: Match the following to the correct atomic number Atomic number: 17 Atomic number 18 Atomic number 19 Atomic number 20 An isotope with 18 neutrons and a mass number of 35 An isotope with a mass number of 40 and 20 neutrons

Solution

Solution Steps

Step 1: Identify the Atomic Numbers

First, we need to identify the elements corresponding to the given atomic numbers:

Atomic number 17 corresponds to Chlorine (Cl).
Atomic number 18 corresponds to Argon (Ar).
Atomic number 19 corresponds to Potassium (K).
Atomic number 20 corresponds to Calcium (Ca).

Step 2: Determine the Element from Isotope Information

Next, we use the given isotope information to determine the elements:

An isotope with 18 neutrons and a mass number of 35: \[ \text{Number of protons} = \text{Mass number} - \text{Number of neutrons} = 35 - 18 = 17 \] The element with atomic number 17 is Chlorine (Cl).
An isotope with a mass number of 40 and 20 neutrons: \[ \text{Number of protons} = \text{Mass number} - \text{Number of neutrons} = 40 - 20 = 20 \] The element with atomic number 20 is Calcium (Ca).