1. This element has 12 electrons when the atom is electrically neutral.

2. This element is an alkaline-earth metals group. It has 20 protons.

3. This element has 7 electrons when the atom is electrically neutral.

4. An isotope of this element has 8 neutrons and a mass of 14.

5. This element has a chemical symbol Hg.

6. This element belongs to the same group as aluminum (Al) and has an atomic mass of 69.72.

Question

Chemistry

Davis Clay

20 July, 11:45

1. This element has 12 electrons when the atom is electrically neutral.

2. This element is an alkaline-earth metals group. It has 20 protons.

3. This element has 7 electrons when the atom is electrically neutral.

4. An isotope of this element has 8 neutrons and a mass of 14.

5. This element has a chemical symbol Hg.

6. This element belongs to the same group as aluminum (Al) and has an atomic mass of 69.72.

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Answers (1)

Know the Answer?

Nathanial Hardy · Answer 1

1. Magnesium (Mg)

2. Calcium (Ca)

3. Nitrogen (N)

4. Carbon (C)

5. Mercury (Hg)

6. Gallium (Ga)

Explanation:

1. Neutral means same no. of protons and electrons which is atomic number. So element with Atomic number 12 is Magnesium.

2. No. of protons = Atomic number. So element with Atomic number 20 is Calcium.

3. Neutral means same no. of protons and electrons which is atomic number. So element with Atomic number 7 is Nitrogen.

4. C-14 isotope has two extra neutrons making it 6+2 = 8 neutrons.

5. Mercury (Hg) is the name of element.

6. Gallium (Ga) and Aluminium together belongs to Aluminium family.