Question

An atom ot elemento contains 19 electrons, 19 protons and 20 neutrons
What is Q ?

A. calcium
B. potassium
C. Strontium​

Answer 1

Answer:

B. potassium

Potassium is a chemical element with the symbol K and atomic number 19. Potassium is a silvery-white metal that is soft enough to be cut with a knife with little force. Potassium metal reacts rapidly with atmospheric oxygen to form flaky white potassium peroxide in only seconds of exposure.

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Answer 2

ANSWER POTASSIUM

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