Atoms
Moles
Periodic Table
Element Facts
Miscellaneous
100
According to Bohr's model of the atom, electrons behave like
Planets orbiting the sun.
100
A mole is an SI base unit that describes the
Amount of a substance.
100
The number of elements in the periodic table is based on
The number of protons in the nucleus.
100
Oxygen's atomic number is 8 This means that an oxygen atom has
8 protons in its nucleus.
100
The nucleus of an atom has a __________ charge.
Positive.
200
An atom's mass number equals the number of
Protons plus the number of neutrons.
200
The __________ is the SI unit that is used for counting small particles, such as atoms.
Mole.
200
On the periodic table, the alkali metals can be found
In the left-most column of the periodic table.
200
How many protons does Magnesium have?
12
200
Who was the first American woman to fly in space?
Sally Ride
300
According to Bohr's theory, an electron's path around the nucleus defines its
Energy level.
300
The number of particles in one mole of a substance is referred to as
Avogadro's constant.
300
The __________ are located in the center of the periodic table.
Transition metals.
300
What is the molar mass of Carbon?
12.01 g/mol
300
78% of air is made up of this element.
Nitrogen.
400
Atoms of elements that are in the same group have the same number of
Valence electrons.
400
Molar mass is defined as
The mass in grams of 1 mole of a substance.
400
__________ exist as single atoms rather than as molecules.
Noble gases.
400
How many valence electrons does Beryllium have?
2
400
This person devised the periodic chart of elements.
Dmitri Mendeleev.
500
Atoms have no electric charge because they
Have an equal number of electrons and protons.
500
Dalton's atomic theory stated that every element was made of atoms that could not be subdivided, atoms of the same element are alike, and
Atoms can join to form molecules.
500
Most halogens form compounds by
Gaining an electron to form a negative ion.
500
What is the molar mass of Tungsten?
183.85 g/mol
500
The name of the galaxy in which the Earth is located.
Milky Way.
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