What is the mass of an atom that has 14 protons, 9 neutrons, and 20 electrons
23 amu?
Mg and Ca are metals that belong to this group in the periodic table
What is group 2
How many Neutrons does the Element Uranium(92) have?
146
Metals are mostly found on this side of the periodic table.
What is the left?
This element has 67 protons
What is Holmium?
Elements within the same group have similar
What is chemical properties
Modern periodic tables are arranged by this property, not atomic mass.
What is atomic number or number of protons
Ra is the chemical symbol for this element
What is Radium?
Poor conductors of heat and electricity
What are Nonmetals?
This scientist is credited with arranging the first periodic table by atomic mass.
Who is Dmitri Mendeleev?
In a neutral atom, the number of protons equals this number.
What is electrons
Are good conductors of heat and electricity & the most reactive elements on the periodic table
What are Metals?
Identify an element that would have similar chemical properties to the element Nitrogen (N).
What is P, As, Sb, Bi, Mc, Tm, Md
This group of elements in column 18
What are the Noble gasses