The Atom
Which subatomic particles make up the atomic mass?
What is the neutrons and protons.
Write the isotope symbol for the information below:
10 protons
9 neutrons
10 electrons
19 Ne
10
How many sublevels are in the d orbital?
5
As you move across a period, what happens to the atomic radius and why?
The atomic radius decreases because there are more protons (greater nuclear pull).
The creator of the Periodic Table
Dmitri Mendeleev
This number represents the number of protons in an atom.
atomic number
How many neutrons does potassium-40 have?
21
How many electrons can you put in each sublevel?
2
What is the term for the amount of energy to remove an electron?
Ionization energy
This group of elements belongs to the family that has 7 valence electrons.
Halogens.
Most of the space of an atom is occupied by which part of the atom?
electron orbitals.
Write the isotope name for the following:
33 protons
41 neutrons
33 electrons
Arsenic-74
What is the electron configuration for germanium.
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2
As you move down a group, what is the trend for electronegativity and why?
The electronegativity decreases because there is more electron orbitals. (harder for the nucleus to attract electrons)
What do atoms of elements that are in the same group have in common?
They contain the same number of valence electrons.
A subatomic particle that has about the same mass as a proton.
neutron.
Find the following for the isotope: Cobalt-59.
mass:
protons:
neutrons:
electrons:
mass: 59
protons: 27
neutrons: 32
electrons: 27
What is the electron configuration for molybdenum?
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d4
Which element has the greatest electronegativity?
fluorine
These elements are dull, brittle and poor conductors of electricity.
Non-metals (located on the right side)
Isotopes of an element contain different numbers of what subatomic particle?
neutrons
Find the following for Iodine-126
mass:
protons:
neutrons:
electrons:
mass: 126
protons: 53
neutrons: 73
electrons: 53
What element is:
1s2 2s2 2p6 3s2 3p6 4s2 3d8
Nickel
Which family on the periodic table has no electronegativity? Why?
The noble gases because they already have a full outer ring.
How many groups are on the Periodic Table
18