this is the name of the vertical columns on the periodic table.
What is a family or group?
100
the elements in the boron group (13) have this many valence electrons.
What is 3?
100
H2O has this many atoms of hydrogen.
What is 2?
200
an educated guess
What is a hypothesis?
200
this part of the atom has no charge..
What is the nucleus?
200
the name of the rows going across the periodic table.
What is a period?
200
elements are placed on the periodic table according to this.
What is their atomic number?
200
There are this many atoms in one molecule of H2SO4.
What is 7.
300
If I use more labs, then the students will make better grades on their tests. Making better grades on their tests is this...
What is the dependent variable?
300
the 2 parts of the atom found in the nucleus.
What are the protons and neutrons?
300
this family of elements includes H, Li, Na, and K.
What are the alkali metals?
300
chlorine is in group 17 which is named this.
What are the halogens?
300
this is the number of electrons that atoms want to have in their outer energy level when bonding.
What is 8?
400
If I use more labs, then the students will make better grades on their tests. Using more labs is this...
What is the independent varible?
400
the electrons live in this
What is the electron cloud?
400
this family does not react with any other elements.
What are the noble gases?
400
elements in the halogen family have this many valence electrons.
What is 7?
400
this is how potassium, which has 1 valence electron, will bond with chlorine, which has 7 valence electron.
What is chlorine will take 1 electron from from potassium?
500
Mr. Ely decided to see if using more labs will make his students have better grades on their tests. He tests this by having his 1st period class do 3 labs a week. His 2nd period class doesn't do any labs. He gives both classes the same test after 3 weeks. This experiment can be improved by doing this...
What is test only 1 class?
500
this is the reason why atoms have a neutral charge.
What is because they have the same numbers of protons and electrons?
500
these group numbers make up the transition metals.
What are groups 3 through 12?
500
as you move down a group or family, the number of this increases by one.
What is the number of energy levels?
500
calcium, a metal, bonds with oxygen, a nonmetal, which is this type of bond.