The electron configuration for Helium (He) is shown below. 152
Which diagram shows the correct distribution of electrons in the electron shells of a helium atom?
1P
ON

2 electrons in the atomic shell

Helium belongs to the noble gas group (group 18), s block and period 1

Electron configuration: 1s²

Symbol: ₂He⁴

With atomic number 2 and mass number 4, the composition of the subatomic particles is:

2 protons, 2 electrons, and 2 neutrons

2 protons and 2 neutrons make up the atomic nucleus while 2 electrons are in the atomic shell

zfoods? ok, pressure is used to keep the heat inside and to keep the food perfect.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3