Question

un, sodium, gold, aluminium, potassium
( Reacts vigorously with cold water to liberate hydrogen.
Céis Beerns with a golden yellow flame.
(h) Dissolves in aderaregia.
(év Reacts with both acids and alkalis to liberate hydroogen.
( Burns with brick red flame.
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Question 7
(a) Statements given below are incorrect. Write the correct statement.
(e) The valeudy o hydrogen and all non-metals is considered positive.
(ü Symbol of sodiem element is so.
(16) A Symbol represents one molecule 7 an element.
in Symbol of elements with variable valencias change but the valevey remain
D A group of atoms (having megalive or positive charige on them) which same.
can retain its identily eu' chemical reactions is called son,
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Answer 1

Anwer:

Explanation:

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