Groups/ Families on the Periodic Table

Group Contains: Metals
Electrons in the outer energy level: 1 (Valence Electrons)
Reactivity: VERY Reactive
Charge: 1+
Alkali Metals
Any of the following: 1 valance electron, very reactive, soft metals, silver-colored, shiny, low density
What are two properties of the alkali metals?
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Group Contains: Metals
Electrons in the outer energy level: 2
Reactivity: VERY Reactive, but LESS reactive than alkali metals
Charge: 2+
Alkaline-earth Metals
They are so reactive that they will automatically react with water or oxygen in the air.
Why are neither the alkali metals nor the alkaline-earth metals found uncombined in nature?
Group Contains: Metals
Electrons in the outer energy level: 1 or 2 Valence Electrons
Reactivity: LESS reactive than alkaline-earth metals
Transition Metals
Group Contains:
1 Metalloid, 4 metals
Electrons in the outer energy level: 3
Reactivity: Reactive
Charge: 3+
Boron Group
Group Contains: 1 Nonmetal, 2 Metalloids, 2 metals
Electrons in the outer energy level: 4
Reactivity: Varies among the elements
Charge: 4+
Carbon Group
Group Contains: 2 Nonmetals, 2 Metalloids, 1 metal
Electrons in the outer energy level: 5
Reactivity: Varies among the elements
Charge: 3-
Nitrogen Group
Group Contains: 3 Nonmetals, 1 Metalloid, 1 metal
Electrons in the outer energy level: 6
Reactivity: Reactive
Charge: 2-
Oxygen Group
Group Contains: Nonmetals
Electrons in the outer energy level: 7
Reactivity: VERY Reactive
Charge: 1-
Halogens
They only need to gain one electron which will be very easy
**These elements will be VERY reactive – why???
Group Contains: Nonmetals
Electrons in the outer energy level: 8 (2 for Helium)- Helium has 2 out of 2
Reactivity: UNREACTIVE
Charge: 0
Noble Gases
The elements have a full energy level and do not need more electrons
**These elements are considered to be UNREACTIVE – why??
Electrons in the outer energy level: 1
Reactivity: Reactive
Other Properties: colorless, odorless gas at room temperature
Charge: 1-
**Hydrogen is a special circumstance because its properties match more than 1 group, therefore, it is placed in its own group
Hydrogen
Only has 1 valence electron
Very reactive
Similar to Group 1 Elements (Alkali Metals)
Colorless, odorless gas
Nonmetal
Similar to Group 17 Elements (Halogens)
Some transition metals from periods 6 & 7 are placed at the bottom of the periodic table to keep the table from being too wide.
**TO SAVE SPACE
Lanthanides & Actinides
Having the same number of valance electrons on the outer energy level
What causes the properties of elements in a group to be similar?
18- Noble Gases
Which group has unreactive metals?
Any of the following: 7 valance electrons, very reactive, poor conductors of electric current, react easily with alkali metals to form salts, never found uncombined in nature
What are two properties of the halogens?
Atomic #117
7 valance electrons
Very reactive
Poor conductor of electric current
(same properties as other elements in group 17 – Halogens)
In the future, a new halogen may be synthesized (made in a laboratory). Predict its atomic number and properties.
Same:
Both have 1 valance electron
Both want to give away one electron for a 1+ charge
Different:
Hydrogen is a gas, Sodium is a solid
Hydrogen is a nonmetal, Sodium is a metal
Compare the element hydrogen with the alkali metal sodium
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