Question

An element is located on the left side of the periodic table. it react spontaneously with air and water at room temperature.
a) Name the element and write its symbol
b) Write the formula of its oxide.
c) What is the nature of its oxide?

Answer 1

ANSWER:

(a) SODIUM (Na)

(b) Na2O (sodium oxide)

(c) IT IS BASIC IN NATURE.

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Answer 2

If the element belongs to left side of the modern periodic table and reacts spontaneously with air and water at room temperature, the element must be of the group 1.

a) element- sodium (Na)

[You can write potassium (K) too.]

b) Na2O

c) since elements of group 1 are metals because the react chemically by donating electrons, Na2O is basic oxide.

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