Question

Using the periodic table entry below, match the phrases with their corresponding values.

Answer 1

Explanation:

1. number of protons                                      19                        

2. atomic mass                                               39

3. number of electrons in the n = 1 shell        2

4. number of electrons in the n = 3 shell        8

5. number of neutrons                                     20

An atom is made up of three fundamental particles.

• Protons are the positively charged particles found in the nucleus with the neutrons. Neutrons do not carry any charges.
• Both proton and neutron add up to give the mass number of an atom.
• Electrons have negligible mass and they are negatively charged.

Atomic mass = Number of protons + Number of neutrons.

From the given options:

 number of protons will be 19 and it is the same as number of electrons.

 

The atom is potassium.

Learn more:

Atoms brainly.com/question/2757829

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