3rd Nine Weeks BM

What do the periods on the periodic table tell you?

What do the periods on the periodic table tell you?

number of rings the Bohr model has

What is an electron dot diagram/Lewis dot structure based on?

the family the atom is in

What can you predict from an elements location on the periodic table?

non-metal or metal

What does H2O represent?

chemical formula

Give an example of physical change

color, taste, shape

Give an example of chemical change

flammability

The number in the chemical formula tells you what? What is that number called? ex MgBr2

how many elements that atom has, aka subscript

Each family in the periodic table has it’s own characteristic properties based on. . .

the number of valence electrons (outer ring on the Bohr model)

When an atom loses an electron, what does it become?

cation

Polyatomic ions

an ion that contains more than one atom

Atom

smallest possible unit into which matter can be divided, while still maintaining it’s properties

2 subatomic particles found in a nucleus?

protons and neutrons

greatest number of valence electrons an atom can have

8

rows across periodic table are called

periods

chemistry

branch of science that deals with the identification of the substances of which matter is composed

matter

anything that has mass and takes up space

element

substances that can’t be broken down chemically into other substances

Ernest Rutherford

discovered positively charged nucleus during gold foil experiment

density

measure of the amount of matter present in a volume of substance

mass number of an element

protons + neutrons

density of an object

mass divided by volume

what makes an atom neutral

protons are the same number as electrons

Mendeleev arranged the first table

increasing atomic mass

Element location on the periodic table tells you. . .

the properties of the new elements

What has SIMILAR properties on the periodic table?

elements with the SAME number of valence electrons

most reactive metals on the periodic table

Lithium and Sodium

which elements would gain 2 electrons to become stable?

hydrogen, lithium, beryllium

which elements would have 2 valence electrons?

helium

what info in the periodic table indicates the number of protons in an atom?

atomic number

what parts of the atom move around the nucleus

electrons

how many dots around the phosphorus lewis dot structure

5

noble gases

are the elements that don’t normally form compounds because they are stable

electrons

subatomic particles that have negative electric charge

Proton charge

positive

Neutron (neutral) charge

none

Electron charge

negative

Groups/Families 1

Hydrogen

Groups/Families 2

Beryllium

Groups/Families 17

Flourine

Group/Families 18

Helium

elements in which group are least likely to bond with another atom?

noble gases

Water density (H2O)

997 kg/m3 OR 1 gm/ml