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Science true or false

Atoms and Molecules · CBSE STD 9 (CBSE - English Medium). 3 questions.

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3 questions · self-marked practice — reveal the answer and mark yourself.

Question 11 Mark
The name of $\mathrm{Li}_3 \mathrm{N}$ is lithium nitrite.
Answer
Lithium nitride is a compound with the formula $\mathrm{Li}_3 \mathrm{N}$. It is the only stable alkali metal nitride. The solid is a red or purple color and has a high melting point.
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Question 21 Mark
State whether the following statements are true or false: A sodium ion has positive charge because it has more protons than a neutral atom.
Answer
False.
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Question 31 Mark
State whether the following statements are true or false: A chloride ion has negative charge because it has more electrons than a neutral atom.
Answer
True.
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true or false - Science STD 9 Questions - Vidyadip