Elements
What is the atomic number of hydrogen
1
Are non metals on the left or the right of the periodic table?
Right
How many valence electrons does a neutral atom of sodium have?
1
Do atoms ever actually touch each other?
No
What is the Atomic mass of neon
20.180 AMU
Are metals on the left or the right of the periodic table?
Left
How many valence electrons does a neutral atom of Radon have?
8
Are two atoms of the same element identical?
No
Which element has the chemical symbol Cu.
Copper
Between sodium, magnesium, and aluminium which will have the largest atomic radius?
Sodium
How can you tell how many valance electrons are in an element?
The elements group number
Which one is smaller, an element or an atom?
Atoms
What is a compound element?
Material formed by chemically bonding two or more chemical elements.
Between potassium, germanium, and arsenic, which will have the largest atomic radius?
Potassium
how is an electron considered to be stable?
it is stable when its shell is full
who discovered atoms ¨first¨?
John Dalton
What is the difference between atoms and elements?
Elements are pure substances with specific properties. Atoms are the smallest units of elements that still retain the element's properties.
Between phosphorus, antimony, and bismuth, which will have the largest atomic radius?
Bismuth
What is the max amount of valance electrons that an electron can have?
8
How are energy levels determined in atoms.
energy levels are uniquely determined by the protons and neutrons in the nucleus.