Periodic Table Test Review
Group # of most reactive elements
1
Sodium (Na) has 1 valence electron. Therefore it is in group _____.
1
Magnesium (Mg) has 12 protons. How many neutrons does Mg have?
12
Boron (B) has 3 valence electrons. Therefore it is in group ____.
13
Group # of least reactive elements
18
How many electrons are allowed in the first electron shell?
2
How many energy levels does Beryllium have?
2
Aluminum (Al) has ____ valence electrons and ____ energy levels.
3, 3
Carbon (C) has ____ valence electrons and ____ energy levels.
4, 2
Boron (B) has ____ neutrons.
6
An atom has 4 protons and 5 neutrons in its nucleus. What element is this?
Beryllium-- atomic number is 4
Elements in the same ______ have similar properties.
Group
_______ are the columns of the periodic table.
Groups
What element has the most similar properties to Potassium: calcium, lithium, or barium?
Lithium-- it is in the same group as potassium
_______ are rows on the periodic table
Periods
What elements would have similar chemical properties as Iron (Fe)?
Ru, Os, Hs
True or False: Elements in the same period can be different types of elements (for example, some elements can be metals and some could be nonmetals).
True
An atom has 2 valence electrons. Is it reactive?
Yes-- because it is in group 2 and the left side of the periodic table is most reactive.
The _____ ______ identifies an element.
atomic number
To find the number of neutrons in an element, you subtract the _____ ______ from the _____ _____
atomic number, atomic mass
How does atomic number increase on the periodic table?
by 1 left to right
Groups are ______ on the periodic table.
columns
Elements in the same period have the same number of _____ ______
energy levels
Period # = # of _______ ______
energy levels
Periods tell you how many ______ _____ an element has.
energy levels
elements in the same column, or ______, have similar _______ and the same number of _______ ______.
group, properties, valence electrons
Group 18 is known as the _____ ______. They are colorless and odorless at _____ _______.
noble gases, room temp
To create an atom bomb, scientists split open the _______ , or center, of an atom.
nucleus
Elements in the same group have similar _____.
properties
The atomic number is the same as the number of _____ in an atom.
protons
In a neutral atom, the number of ______ is equal to the number of ______.
protons, electrons
Periods are _____ on the periodic table.
rows
Elements in the same column (group) have _____ properties
similar
Elements in the same group have ______ _______
similar properties
Group 18 contains atoms that are _____ and won't react with other elements.
stable
How are Argon (Ar), Krypton (Kr), and Neon (Ne) similar?
they have same # of valence electrons and similar properties because they are in the same group
I want to know what kind of chemical properties Fluorine (F) has. What subatomic particle would I need to find first?
valence electrons
Elements in the same group have these two things in common...
valence electrons and similar properties
The splitting of an atom's nucleus creates a release of energy that was used as a ________ to end World War II.
weapon (or bomb)
