Question

Complete the paragraph with the words given in the bracket. The central part of an atom is (a)_______ where the mass of an atom is concentrated because it contains the two heavier particles called protons and (b)_______. Protons are positively charged. Electrons move around the central part in their (c)_______ and have a (d)_______ charge.

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Answer 1

Answer:

a. nucleus

b. neutrons

c. orbits or shells

d. negative

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Answer 2

The central part of an atom is (a)nucleus where the mass of an atom is concentrated because it contains the two heavier particles called protons and (b)neutrons. Protons are positively charged. Electrons move around the central part in their (c)orbit and shells and have a (d)negative charge.