Match the atomic number 4,8,14,15and 19 with each of the following: (a) A solid non-metal of valency 3. (b) A gas of valency 2. (c) A metal of valency 1. (d) A non-metal of valency 4.
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(a) A solid non-metal of valency 3-Phosphorous (15): 2,8,5
(b) A gas of the valency 2-Oxygen (8): 2,6
(c) A metal of the valency 1-Potassium (19): 2,8,8,1
(d) A non-metal of the valency 4-Silicon(14): 2,8,4
What are atomic numbers:
- The quantity of protons in an atom's nucleus is known as the atomic number. The number of protons determines an element's identity (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
- The element with atomic number 1 on the periodic table is hydrogen. The number of protons in an atom is known as the element number or atomic number. Since each hydrogen atom contains one proton, it effectively possesses a positive nuclear charge.
- Since the elements are grouped in the periodic table in a way that shows periodic trends in their chemical properties, it is frequently used in the discipline of chemistry to look up chemical elements.
Learn more about atomic numbers:
1. Atomic number is the number of ____ in an atom and atomic mass is the number of ____ in an atom put together
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2. Define Atomic number,Atomic mass ,Mass number
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