Periodic table

which particles have relatively the same mass?

Which group of elements are the metals that we use for coins found?

What is not a characteristic of metals?

What element has the atomic weight of 72.61?

What is an isotope?

What is the most reactive group of elements?

What machine is used to make new elements?

How do you find the number of neutrons on the periodic table?

What has different number of neutrons but the same number of protons?

Elements in the same group have...

What is the group that is found in first column? 

Chlorine, bromine, and iodine are elements in what group?

Which group of elements has the most elements?

Which particle has a negative charge?

In what year did Mendeleev publish his periodic table

What group of Elements loses 1 Valence electrons?

What is the name of the group in the second column on the periodic table?

If an atom has 29 electrons and 38 neutrons...how many protons does it have?

What two particles make up the atomic mass?

Magnesium is atomic # ?????

Which element has 7 valence electrons?

What is a horizontal line on the periodic table

I an atom has an atomic mass of 54 and it has 30 neutrons, how many protons does it have?

What number do you look for to know the number of Valence electrons an element has?

What is group 18 on the periodic table?

Who came up with the first Periodic table?

What is the group on the bottom row on the periodic table called

Which is the most reactive group of elements that are not metals?

What is a vertical group on the periodic table called?

What group of elements does not react?

Which group of atoms gain 1 Valence electron?

Today's periodic table is organized by ....

How do you know how many protons a element has by looking at the periodic table?

What is in period 5 group 3?

How many open spaces did Mendeleev have on the original periodic table?