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An atom X has a proton number of 19 and relative atomic mass of 39.

(i) How many electrons, protons and neutrons are there in an atom of X?

(ii) How many electrons will there be in the outer energy level (shell) of an atom of X?

(iii) What is the electronic configuration of X?

Respuesta :

QingYuan

Answer:

1) electron=19 Proton=19 Neutron=39-19=20

2) 1

3) in pic

Ver imagen QingYuan
JungEunKyung

Answer:

(i)electrons = 19; Protons = 19 Neutrons =39-19=20

(ii) 1

(iii) 2,8,8,1

Hope this helps.

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