21
21
21
21
21
100
The elements in a column form a ....
Group
100
what is the chemical symbol for Magnesium.
Mg
100
the number of protons in the nucleus of an atom is the ______ of that atoms element.
atomic number!:)
100
what is the chemical symbol for gold?
What is Au
100
The periodic table is arranged in rows called ......
Periods
200
The chemical symbol Zn is for??
Zinc.
200
atoms with the same number of protons and different number of neutrons are called _____
isotopes!:)
200
An isotope is identified by its __________, which is the sum of the proton and neutron in the atom.
What is mass number
200
what is chemical symbol ?
A 1 or 2 letter representation of an element
200
Boron is what Metal Metalloid Nonmetal
It is Metalloid
300
it takes almost ______ electrons to equal the mass of one electron.
1,840!:0
300
An ______ is the smallest particle that still can be consider an element
What is atom
300
A periodioc table is an arragement of elements showing the repeating patterns o their ......
Properties
300
what is the chemical symbol for phosphorus?
It is S!
300
what is the chemical symbol for Ytterbium?
It is Yb.
400
the sum of the protons and neutrons in a atom is called ______
mass number!:)
400
atoms with the same number of protons and different number of neutrons are called ________
isotopes!:)
400
the elements in a columm form a _________.
group
400
what element has the chemical symbol of CL?
chlorine
400
what is the chemical symbol of Iodine?
I
500
The _______ of an element is the average mass of all the isotopes of that element
Atomic Mass
500
what is the chemical symbol Tb for.
Terbium
500
what is the chemical symbol As for.
Arsenic
500
what is the chemical symbol At for.
Astatine
500
what is the atomic mass 131.30 What is the chemical.
Xenon
M
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n
u