What are substances made from?
What element is in group 13, period 1?
B - Boron
What element is period 4, group 14?
Sn - Tin
The smallest part of an atom
What is an electron
What element is in group 1, period 4?
K - Potassium
Atomic numbers are identified by the number of _____ in the nucleus
What is protons
Xe - Xenon
When finding the # of valence electrons, what element is the one except of the rules?
What group and row is the element Rhodium?
Group 9, period 2
The number of neutrons in Iodine
74
answer varies