Atoms and Bohr-Rutherford
In an atom, what has a Positive charge?
Negative Charge?
Neutral Charge?
proton-positive
electron- negative
neutron- neutral
What is a molecule?
Two or more atoms joined together
What are the Vertical Columns on the periodic table?
Groups
What are two important categories of elements?
metals and nonmetals
What particles are within the nucleus?
Proton
Neutron
What is compound?
A molecule made up of two or more elements
What are the horizontal rows on the periodic table?
Periods
2/3 of the elements are what?
Metals
How many electrons are in the first shell?
2
What is the common name for NaCl?
Salt
Elements in the same group on the periodic table have similar ______________________
Properties
What are shiny, ductile, malleable, and conductive?
Metals
Electrons follow orbits around the nucleus called _____
Shells
Is water a compound? Why?
Yes, it has more than one element water and hydrogen.
How many periods are there?
7
What are the properties of metals?
shiny
ductile
malleable
conductive
Draw helium atom. Atomic number 2.
2 protons in the nucleus.
2 electrons in the second shell
Is oxygen a compound?
No it's a molecule, but not a compound.
How many groups are there on the periodic table?
18
If an element has the atomic number 7, how many protons will it have?
7