Chem

Elements, compounds, mixtures

100

Define the two types of mixtures 

Homogeneous and heterogeneous 

200

True or false: H2O and H2O2 are the same compound

false

300

Is the following pure substance an element or compound (NaHCO3)

compound

400

What does the group of an element tell you

valence electrons (most outer electrons)

500

Fill in the blank.. 

Elements found in group 1 are called ____

Elements found in group 2 are called ____

Elements found in group 17 are called ____

Elements found in group 18 are called ___

Alkali metals 

Alkali Earth metals 

Halogens 

Noble gases

atoms, isotopes, ions

100

What are isotopes?

Atoms of the same element with different numbers of neutrons because of the different mass #

200

True or false: Negative ions lose electrons 

false 

300

Is the following element an ion or isotope (sulfur - 33) 

isotope

400

Would sodium lose or gain electrons to become stable and how many electrons would it lose or gain

lose 1

500

Find the following for the element Neon (Ne) 

Mass (rounded) ____ 

# of Protons ____ 

# of Electrons ____

# of Neutrons ____

mass = 21

protons = 10

electrons = 10

neutrons = 11

Periodic table

100

name 3 elements that is in the same PERIOD as iron (Fe). 

potassium, calcium, scandium, titanium, vanadium, chromium, manganese, cobalt, nickle, copper, zinc, gallium, germanium, arsenic, selenium, bromine, or krypton

200

Name a metal, non-metal, and a metalloid.

possible answer: metal - nickel 

non-metal - helium

metalloid - boron 

300

What is the difference between metals and non-metals on the periodic table? 

Metal and non-metal reactivity trends are opposite because metals become more stable by losing electrons, while non-metals become more stable by gaining electrons.

400

Why can't noble gases (group 18) with other elements?

Because they are already stable

500

Why does the reactivity increase as you go down group 1? 

Reactivity increases as you go down the family because the size of the atom increases and the pull from the nucleus on the valence electrons decreases. 

Counting atoms

100

How many ELEMENTS does Ba(NO₂)₃

3

200

Find the amount of atoms in each element - (NaOH) 

Na - 1

O - 1

H - 1

300

How many molecules does 3Br₂  have 

3

400

Find the amount of atoms in each element - Mg₃(PO₄)₂

Mg = 3

P = 2 

O = 8

500

Is (NH₄)₃PMo₁₂O₄₀ a compound or a mixture?

compound 

Bonding basics

100

What is an ionic and covalent bond?

ionic = metal and nonmetal 

covalent = non-metal and non-metal

200

Do ionic bonds TRANSFER or SHARE electrons? 

Transfer

300

If sodium (Na) and chlorine (Cl) form an ionic bond, which element would LOSE electrons? 

Sodium would lose 1 electron

400

What type of bond would be made if Nitrogen reacted with Fluorine? 

Covalent 

500

DRAW a lewis dot diagram showing the covalent bond with carbon and 4 hydrogens 

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