Answer:
Na
N
Si
O
K
Ti
Explanation:
To know what symbol corresponds to the electron configurations, we just have to count the number of electrons.
⇒1s² 2s² 2p6 3s1
This means there are 2 electrons on the first shell
8 electrons on the second shell
and 1 electron on the third shell
in total there are 11 electrons ⇒ this means the atom number is 11
If we look at the periodic table to atom number 11 we'll see that this is Sodium (Na).
⇒ 1s² 2s² 2p³
This means there are 2 electrons on the first shell
and 5 electrons on the second shell
So 7 electrons in total ⇒ this means the atom has atom number 7
⇒Nitrogen (N)
⇒ 1s² 2s² 2p6 3s² 3p²
This means there are 2 electrons on the first shell
There are 8 electrons on the second shell
There are 4 electrons on the third shell
So there are 14 electrons in total ⇒ atom number 14
⇒Silicon (Si)
⇒1s² 2s² 2p4
This means there are 2 electrons on the first shell
There are 6 electrons on the second shell
8 electrons in total ⇒ atom number = 8
⇒Oxygen (O)
⇒ 1s² 2s² 2p6 3s² 3p6 4s1
This means there are 2 electrons on the first shell
There are 8 electrons on the second shell
There are 8 electrons on the third shell
There is 1 electron on the fourth shell
This means there are 19 electrons in total ⇒ atom number 19
⇒Potassium (K)
⇒ 1s² 2s² 2p6 3s² 3p6 3d² 4s²
This means that 2 electrons on the first shell
There are 8 electrons on the second shell
There are 10 electrons on the third shell
there are 2 electrons on the fourth shell
There are 22 electrons in total ⇒ atom number 22
⇒ Titanium (Ti)
