Leaving Cert Chemistry Atomic Structure: The following words are omitted

Question

The following words are omitted from the passage below.

neutral
Rutherford
Bohr
mass
negative
positive

Write in your answerbook the omitted word corresponding to each of the numbers (1 to 7).

The number of protons in an atom is its _1_ number and the sum of the protons and neutrons in its nucleus is its _2_ number. The number of electrons in the electron cloud of a _3_ atom is the same as the number of protons in its nucleus.
It was _4_ who discovered that an atom has a small dense _5_ central nucleus and it was _6_ who first described the arrangement of the electrons in energy levels in the electron cloud of an atom. In a chemical reaction an atom becomes charged if it loses one or more of its electrons or gains one or more additional electrons. If the atom gains one or more electrons it becomes a _7_ ion.

The following words are omitted from the passage below - Leaving Cert Chemistry - Question (a) - 2021

Worked Solution & Example Answer:The following words are omitted from the passage below - Leaving Cert Chemistry - Question (a) - 2021

1. The number of protons in an atom is its ___

2. The sum of the protons and neutrons in its nucleus is its ___

3. The number of electrons in the electron cloud of a ___

4. It was _ who discovered that an atom has a small dense _

5. The central nucleus and it was ___ who first described

6. The arrangement of the electrons in energy levels in the electron cloud of an atom.

7. If the atom gains one or more electrons it becomes a ___

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