Three elements P Q and R have atomic number 4, 12 and 20 respectively a) state the number of valence electron in each of the elements. b)Are these elements going to have a similar or different chemical properties ?
c)Are these elements metals or nonmetals
Answers
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2
Explanation:
P is Be
Q is Mg
R us Ca
(a) Each of these will have two valence electrons in the outer most shell as they belong to Group 2 of the Modern periodic table.
(b) They will have similar Chemical properties because they belong to the same group.
(c) These are metals.
Answered by
2
Answer:
P is beryllium, Q is magnesium, R is calcium
Explanation:
a) P has 4 valence electrons
Q has 2 valence electrons
R has 2 valence electrons
b) similar chemical properties
c) metals
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