Use the periodic table to give the name and symbol for each of the following elements:
(a) the halogen in the same period as the alkali metal with 11 protons
(b) the alkaline earth metal in the same period with the neutral noble gas with 18 electrons
(c) the noble gas in the same row as an isotope with 30 neutrons and 25 protons
(d) the noble gas in the same period as gold

Question

12-08-2019
Chemistry

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Use the periodic table to give the name and symbol for each of the following elements:
(a) the halogen in the same period as the alkali metal with 11 protons
(b) the alkaline earth metal in the same period with the neutral noble gas with 18 electrons
(c) the noble gas in the same row as an isotope with 30 neutrons and 25 protons
(d) the noble gas in the same period as gold

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pstnonsonjoku pstnonsonjoku · Answer 1 · 2021-10-28T20:11:54+02:00

The periodic table provides a systematic manner of classifying elements.

Halogens are elements of group 17. They are the second to the last group in the periodic table. The alkali metal with 11 protons is sodium and it is found in period 3. The halogen in the same period as sodium is chlorine.

The noble gas that has 18 electrons is argon. Argon is found in period 3. The alkaline earth metals are metals of group 2. The only alkali metal in period 3 is magnesium.

The isotope with 25 protons and 30 neutrons is manganese. This is in period four of the periodic table. The noble gas in the fourth period is krypton.

Gold has atomic number 79 and is found in the sixth period. The noble gas found in the sixth period is radon.

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