The mass of the atom is concentrated in its nucleus
the mass of electron is neglected compared to protons and neutrons which found inside the nucleus
who is this football player?
what's the name of this player?
2-An element H, its electrons are distributed in two energy levels and the outermost energy level contains 4 electrons and there are 6 neutrons in its nucleus 1- Show by drawing the electronic configuration for this element 2- Find
1- 2,4 2-12 3-
An element its outermost energy level (M) contains one electron So its atomic number is
11
Atomic mass is double atomic number in oxygen as A=16 and Z=8 (G.R)
Because the oxygen has 8 protons and 8 neutrons and the atomic number is protons only while the atomic mass is the protons and neutrons
The atom is electrically neutral
because the number of positive protons is equal to the number of negative electrons
The energy level (L) is saturated with 8 electrons
because according to the mathematic relation 2n^2 the number of electrons saturate the L level is 2x2^2= 8
The first scientific theory about the atom
dalton
It is advised to reduce the use of lots of fertilizers.
it's harmful for the soil, plants, human and all the enviroment
-An element has 13 protons and number of its neutrons is more than number of its protons by one Find: a) number of electrons b) number of nucleons c) electronic configuration d) number of electrons in the outermost energy level
a-13 b-27 c-2,8,3 d-3
The chemical symbol of potassium is
K
Particles its mass can be neglected while its charge can’t
electron
Inside the nucleus of the atom, mostly the number of ………….. is more than or equal the number of protons
neutrons
the girl from inside out movie
railey
The level (M) is saturated first with electrons before the level (N)
because the energy of the N level is more than M level
Particles its charge can be neglected while its mass can’t
neutron