Download Chemistry Unit Study Guide Key

Chemistry Unit Test
Study Guide Key
Vocabulary
1) atom
2) compound
3) period
4) neutralization
5) subscript
6) chemical formula
7) chemical reaction
8) conservation of mass
9) reactant
10)
product
11)chemical equation
12)
coefficient
13)
proton
14)
neutron
15)
electron
16)
ionic bond
17)
covalent bond
Content
1) difference between an element and compound – A compound is made of one
or more elements that are bonded together; An element is a pure, single
substance made of one type of atom.
2) examples of compounds – CO2, C6H12O6, NaCl, N2, O2, Fe2O3, H2O
3) where metals and nonmetals are found on the periodic table – Metals are to
the left of the zig-zag line; Non-metals are to the right.
4) examples of physical and chemical properties – Physical Properties: Luster;
Hardness; Color; Conductivity; Density; Malleable; Ductile; States of Matter;
Boiling Point.
Chemical: Ability to rust; Ability to Burn.
5) examples of physical changes – Breaking glass; melting ice; Cutting; Boiling
6) difference between physical and chemical changes – In a physical change,
nothing new is formed. In a chemical change, a new substance is formed.
7) what it means if elements are in the same family/group – They have similar
properties.
8) how to find elements on the periodic table – You can use the group and
period that the element is in, it’s atomic number, or it’s atomic mass.
9) examples of heterogeneous and homogeneous mixtures – heterogeneous:
trail mix; chex mix; salad; fruit cups; skittles; Italian salad dressing.
Homogeneous: Blood, air, salt water, coffee, sweet tea, kool aid.
10)
properties of acids – Sour taste; pH below 7; Corrode metals; React
with bases
11)properties of bases – Bitter taste; slippery; pH above 7; react with acids
12)
pH scale - what is it and what does it tell us – tells how strongly acidic
or basic or neutral a substance is. A scale from 0-14.
13)
what it means when an equation is “balanced” – The number of atoms
and types of atoms are the same on both sides.
14)
symbols for common elements – see your study guide for quiz 2
15)
formula for salt, sugar, and oxygen gas – Salt NaCl; Sugar C6H12O6;
Oxygen O2
16)
structure of chemical equations – reactants  products (includes
formula, coefficients, and subscripts)
17)
where protons, neutrons (nucleus), and electrons (surrounding shells)
are found in atoms
18)
what information can you find in each block of the periodic table –
atomic number, symbol, element name, atomic mass
19)
balancing equations – see worksheet
20)
how balanced equations support the law of conservation of mass – The
laws says that no matter can be created or destroyed. Therefore, each side
of the equation must be the same.
21)
two differences between ionic (electrons are taken from metals and
given to non-metal) and covalent (shared between non-metals) bonds
22)
using subscripts to find the number of atoms – The subscript gives you
the number of atoms of the element it comes directly after. H2O has 2
hydrogen atoms.
23)
formula for volume – L x W x H
24)
formula for density and units – M/V with g/mL for units
25)
how to know if an object will float or sink – It will float if its density is
less than the liquid. It will sink if its density is more than the liquid.