Question

the nucleus of an atom? (1)
7. Are mass number and atomic mass of an element equal in all respects?
8. What are ions? What are its lovo types? (1)
9. The element aluminiuritten by the symbol 23 Al. Write the numbe
electrons and neutro in it. (1)
10. Out of C-12 and C-14 iso
of carbon, which is of radioactive nature?
11. Which of the two will be chemically more reactive; element X with aton​

Answer 1

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7.Atomic Mass and Mass Number Don't Mean the Same Thing

One is the average weight of an element and the other is the total number of nucleons in the atom's nucleus. Atomic mass is also known as atomic weight. ... The mass number is a count of the total number of protons and neutrons in an atom's nucleus.

8.An atom or a molecule that has gained or lost one or more of its parts (electrons) and so has a positive or negative electric charge.

There are two types of ions :

cations.

anions.

11.The element with atomic number 17(chlorine)is more reactive cause it needs to gain only one electron to become stable while the element with atomic number 16 needs 2 electrons to become stable.