Question

In the above table, are given eight elements A,B,C,D,E,F,G and H. Of the modern periodic table with the atomic numbers of the elements in parenthesis.

1.what is the electronic configuration of F?

2.what is the number of valence electrons in the atoms of F?

3.write the size of atoms of E, F, G and H in decreasing order?

4.out of B, C and F; which have the biggest size?

5.state whether F is a metal or nonmetal.​

Answer 1

Answer:

Explanation:

1.  1s2 2s2 2p6 3s2

2. 2 valance electrons (2 in s)

3. H > G > F > E

4. C

5. It  is a metal

further info: A- Li (lithium)- 1s2 s21

                   B- Na (sodium Na for Natrium) - 1s2 2s2 2s6 3s1

                   C- K (pottassium [K for Kalium]-  1s2 2s2 2p6 3s2 3p6 4s1

                  D- Rubidium (Rb)- 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s1

E- Berelliyum Be- 1s2 2s2

F- Magnesium- Mg- 1s2 2s2 2p6 3s2

G-calcium- Ca- 1s2 2s2 2p6 3s2 3p6 4s2

H- Strontium- 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2

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