The concepts of triads suggested that the properties of an elements are related to its
What is atomic mass
100
the statements that the physical and chemical properties of the elements repeat in a regular pattern when they are arranged in order of increasing atomic number
What is periodic law
200
a bond between a metal and non-metal
What is a ionic bond
200
Elements in group 17 are classified as
What is halogens
200
Name ONE property of a non-metal?
What is poor electrical conductivity, brittle as a solid, and poor conductors of heat
200
When an atom loses an electron, it becomes a __________ ion
What is positive
200
An atom becomes stable by having eight electrons in the outer energy level
What is Octet Rule
300
Lithium has much less attraction for any valence electrons than does fluorine. Atoms of these two elements would for __________ bonds
What is ionic
300
Elements in group 2 are classified as
What is Alkaline Earth Metals
300
Water is often called the universal
What is solvent
300
The earliest attempts at classifying elements were based on
What is similar properties
300
forces between particles that make up a substance and also determines the state of matter in an atom
What is interparticle force
400
This is the reason ionic compounds have high melting points
What is a strong crystalline structure
400
True or False: All Noble Gasses have the same electron configuration
What is False
400
What family of elements would be most useful in a study of radioactive metals
What is the actinide family
400
Most semi-conductor are
What is metalloids
400
The tendency to occur at regular intervals
What is periodicity
500
When electrons share they produce a
What is a molecule
500
What is the purpose of the stair-step line located near the right-hand side of the periodic table
What is separation of metals and non-metals
500
What is a liquid metal that can be used in electrical switches
What is mercury
500
True or False: Because chlorine kills living cells and is soluble in water, it is an excellent disinfectant for water supplies and swimming pools.
What is True
500
Who classified elements that had similar chemical properties into triads according to their atomic mass