21. The atomic number of an element is 20. In which period of the modern periodic
table, could this element be placed? Why? How will you decide whether the element
is a metal or a non-metal?
Answers
Answered by
0
Answer:
calcium is the correct answer hope it helps you
Answered by
1
Answer:
it can be placed in 2nd A group. as in periodic table metals are placed LHS we can say that element with atomic no. 20 is metal and the metal is calcium
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