Valence Electrons
These are the electrons found in the outermost energy level of an atom.
What are valence electrons?
Atoms of the same element with different numbers of neutrons are called these.
What are isotopes?
The period number tells you this.
What is the number of energy levels?
Group 17 elements are called these.
What are halogens?
The number of neutrons in an atom can be found by subtracting this from the mass number.
What is the atomic number?
The group number on the periodic table tells you this about an element.
What is the number of valence electrons?
Carbon-12, carbon-13, and carbon-14 differ in this subatomic particle.
What are neutrons?
The reactivity from left to right on the periodic table
What is less reactive?
Group 18 elements are known as these, and how they got this name
What are noble gases and they are non-reactive
Electrons move between energy levels when this happens.
What is absorbing and releasing energy?
This is the maximum number of valence electrons an atom can have.
What is 8?
Uranium-238 has 92 protons. This is how many neutrons it has.
What is 146?
The physical property trend from left to right of the periodic table
What is less metallic?
Group 2 elements form ions with this charge.
What is +2?
Atoms gain or lose valence electrons because they are trying to become this.
What is more stable?
This element is in Group 16. It has this many valence electrons.
What is 6?
Even though atomic masses are decimals on the periodic table, this value is always a whole number for one atom.
What is the mass number?
An element in period 3 with 4 valence electrons is this element.
What is Silicon?
Elements that typically form -2 ions are found in this group.
What is group 16?
During the flame lab, we observed various flame colors produced by different compounds.
What are the different electron configurations of metal elements?
Atoms gain or lose valence electrons during chemical reactions instead of inner electrons because valence electrons are this.
What are less tightly held / easier to lose or gain / involved in bonding?
Atomic mass is a weighted average based on this property of isotopes.
What is percent abundance?
Hydrogen is in Group 1 while helium is in Group 18 because of this reason.
What is their valence electron configuration?
There are only 2 elements in the first period because this energy level can only hold this many electrons.
What is 2?
If sulfur gains 2 electrons, the ion is written this way.
What is S²⁻?