Periodic Table of Elements Questions
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Colorless, odorless gas exhibits properties of both metals and nonmetals
Assigning atomic masses. composition of compounds and organizing the elements
Came up with the atomic mass values for the elements.
The amount of energy required to remove an electron from an atom
one-half the distance between the nuclei of identical atoms that are bonded together
Group 1, very reactive group of metals, not found in nature, silvery in appearance, soft enough to be cut with a knife.
When elements are arranged in increasing atomic numbers they have similar properties at regular intervals
Developed a table and arranged the elements in order of increasing atomic mass.
Determined an atomic number for each known element and arranged the Periodic table by increasing atomic number
How many elements had been discovered before the Periodic Table
A _____ has a definite volume but no definite shape.
The particles in a ____ are the farthest apart and move the fastest.
A state of matter with no definite shape or volume is known as this.
state of matter with a definite volume and a definite shape is called this.
Molecules are closest together in a
Where would you find the # of electrons
How many groups are in the modern periodic table?
The element phosporus is located to the right of the element magnesium along the same period in the periodic table.Which best describes the relationship of the elements?
In an element's square on the periodic table, the number with the greatest numerical value represents the
Which two chemists organized elements based on properties such as how the elements react or whether they are solid or liquid?