Science Fill In The Blanks.

The atom of the element ……………. has eight electrons in the outermost shell.

The maximum capacity of the M shell is ………………… electrons.

All atoms, except ………….. contain neutrons in their nuclei.

According to the atomic model of …………….., electrons are embedded in a gel of positive charge.

Atomic masses are measured in a unit called …………… .

Electrons in an atom occupy shells in increasing order of …………… .

Electrons in the ………….. shell have minimum energy.

The second shell has the capacity of ……………… .

Electrons revolve around the nucleus in paths called ………….. .

………………. discovered neutron.

Democritus termed the smallest particles of matter as …………… .

The shell-wise distribution of electrons is called the ………………… .

Electrons revolve around the …………….. in certain discrete orbits.

∝ – particles have ………….. charge.

……….. discovered the electron.

Electrons must absorb …………….. to transit between orbits.

Isotopes of the element have the same ……….. properties.

The element ………….. has two electrons in the K shell, but it is a noble gas.

An atom has 11 protons and …………. neutrons and hence its atomic mass number is 23.

126C, …………… and …………. are isotopes of carbon.

Except hydrogen, the nuclei of all atoms contain ………….. .

An atom is electrically ……………. .

The electronic configuration of magnesium is 2, 8, 2. From this it is understood that the valence shell of Magnesium is …………….. .

The electron shell ………….. is nearest to the nucleus.

An electron carries a ……………. charge.

Electron, proton, neutron are the types of ………… in an atom.