Occurs when atoms become more chemically stable by sharing electrons.
What is a covalent bond?
100
Elements in group 1A are classified as this.
What is an alkali metal?
100
This device is used to measure volume.
What is a graduated cylinder?
200
Arranged the periodic table by atomic mass.
Who is Mendeleev?
200
A subatomic particle having a charge equal to but opposite that of an electron.
What is a proton?
200
Electrons in this type of covalent bond share electrons equally.
What is a nonpolar bond?
200
Elements in this group are classified as halogens.
What is group 7A or 17?
200
In most line graphs, the dependent (responding) variable is placed on this axis.
What is the y aixs?
300
Arranged the elements according to the "Law of Octaves".
Who is Newlands?
300
The mass of this particle is approximately equal to the mass of a proton.
What is a neutron?
300
This type of bond occurs when two atoms share two pairs of electrons.
What is a double covalent bond?
300
The transition elements are found in this block of the periodic table.
What is the d block?
300
The number 0.050340 has this number of significant digits.
What is 5?
400
Arranged the periodic table by atomic number.
Who is Moseley?
400
Forms when atoms lose electrons.
What is a cation?
400
The number of single covalent bonds that a carbon atom can form.
What is 4?
400
This group of elements have the properties of being malleable and ductile.
What are metals?
400
456 mm converted to m is this value.
What is 0.456?
500
Determined that the atom is mostly empty space, but contains a small positively charged central core.
Who is Rutherford?
500
Atoms of the same element having different numbers of neutrons.
What is an isotope?
500
The molecular shape the compound NH3 would have.
What is trigonal pyramidal?
500
Elements in group 13 form this charge when they form ions.
What is +3.
500
A student performed an experiment to determine the effect of adding salt on the boiling point of water. The data would best be represented with this type of graph.