Electron Configuration
What is the electron configuration of Bromine?
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵
Krypton- 70 has how many protons?
36
What is the charge of proton?
Positive
The element copper has naturally occurring isotopes with mass numbers of 63 and 65. Calculate the average atomic mass of copper
The relative abundance and atomic masses are:
69.2% with a mass of 63 amu
30.8% with a mass of 65 amu
63.61 amu
The 3 subatomic particles in an atom are...
Electrons, Protons, Neutrons
What is the element with electron configuration of 1s² 2s² 2p³?
Nitrogen
Chromium- 44 has how many neutrons?
20
Which subatomic particle is not counted in the mass?
Electrons
Calculate the average atomic mass of sulfur if 95.00% of all sulfur atoms have a mass of 32 amu, 0.76% has a mass of 33 amu and 4.22% have a mass of 34 amu.
32.08 amu
The dense center of an atom is called?
Nucleus
What is the element with a configuration of [Ar] 4s²?
Calcium
Calcium- 36 has how many electrons?
20
What is the number of electrons equal to?
The number of protons
Naturally occurring strontium consists of four isotopes, Sr-84, Sr-86, Sr-87 and Sr-88.
What is the average atomic mass of strontium?
Below is the data concerning strontium:
Sr-84 Sr-86 Sr-87 Sr-88
0.56% 9.86% 7.00% 82.58%
87.71 amu
The electrons are located in the...
Electron cloud
What is the abbreviated electron configuration of Manganese?
[Ar] 4s² 3d⁵
Sodium-22 has how many neutrons?
11
What is the charge of a neutron?
Neutral
Calculate the average atomic mass of bromine. One isotope of bromine has an atomic mass of 78.92 amu and a relative abundance of 50.69%. The other major isotope of bromine has an atomic mass of 80.92 amu and a relative abundance of 49.31%.
79.90 amu
The overall charge on the atom is
Neutral
What is the electron configuration of Beryllium?
1s² 2s²
Boron-9 has how many neutrons?
4
What is the charge of an electron?
Negative
There are 4 isotopes of Fluorine, F-17, F-18, F-19, F-20. What is the most common isotope?
Fluorine-19
The nucleus has what charge?
Positive