Chemistry 9 Chapter 3 Practice Test 1

Chemistry 9 Chapter 3 Practice Test 1

499

Class 9 Chemistry

Chapter 3

Practice MCQs Test No 1

1 / 10

By the end of 18th century, _______ elements were known.

2 / 10

The horizontal rows of the periodic table are called:

3 / 10

By 1925, ____ elements were known.

4 / 10

Number of periods in the Periodic table are:

5 / 10

The atomic number was discovered in:

6 / 10

Last _____ periods are long periods.

7 / 10

Atomic number was discovered by:

8 / 10

A table showing systematic arrangement of elements is called:

9 / 10

First _____ periods are called short periods.

10 / 10

Elements are arranged in the order of increasing:

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