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Science

Chemical reactions

Atomic structure - Higher tier - Test

1.

If the relative mass of a proton is 1, what is the relative mass of a neutron?

2.

What is the mass number of an atom?

3.

What is the atomic number of an atom?

4.

Isotopes of an element have:

5.

If the Ar of C is 12 and the Ar of O is 16, what is the Mr of CO2?

6.

If the Ar of H is 1, the Ar of O is 16 and the Ar of Ca is 40, what is the Mr of Ca(OH)2?

7.

The number of grams equal to the Mr of a substance is:

8.

If an isotope of sodium has 11 protons and 13 neutrons:

9.

If an atom has a mass number of 27 and an atomic number of 13:

10.

The atom that the masses of other atoms is compared with is: