Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
100

Salt (NaCl) dissolved in water can be described as what type of matter?

(1) element

(2) compound

(3) homogeneous mixture

(4) heterogeneous mixture

(3) homogeneous mixture

100

What is happening to the sample at line BC?

sample is melting

100

Which part of the atom has a positive charge?

(1) orbitals
(2) electrons

(3) valence shell

(4) nucleus

(4) nucleus


PROTONS ARE IN THE NUCLEUS.

100

Which statement below correctly describes what occurs in a nuclear reaction?

(1) Energy is lost as it is converted into mass

(2) Mass is lost as it is converted into energy

(3) Energy is gained as it is converted into energy

(4) Mass is gained as it is converted into energy.

(2) Mass is lost as it is converted into energy.


When a radioactive element decays, its matter breaks down and releases a HUGE amount of energy.

100

During all chemical reactions, we balance charge, mass and energy so they are all...

conserved!

200

Which type of matter would describe sand and water at room temperature?

(1) element

(2) compound

(3) homogeneous mixture

(4) heterogeneous mixture

(4) heterogeneous mixture

200

What is happening at line DE?

sample is vaporizing

200

Why are Ne-19 and Ne-20 isotopes of the same element, based on their subatomic particles?

Ne-19 and Ne-20 have the same number of protons in them- which means they isotopes.

200

Compared to a chemical reaction like combustion, a nuclear reaction has

(1) significantly less energy

(2) slightly less energy

(3) slightly more energy

(4) significantly more energy

(4) significantly more energy


Think about the nuclear power and the atomic bomb - nuclear energy is 100,000,000 times more efficient than burning coal for energy.

200

Based on its placement on the periodic table, why is NaCl an ionic compound?

NaCl is made of a metal and a nonmetal ion.

300

Which separation technique would work best to separate two liquids?

(1) filtration

(2) distillation

(3) chromatography

(4) evaporation

(2) distillation --> best for two liquids.

300

Choose one point where only the kinetic energy of the substance is increasing.

AB, CD, EF

300

Based on the Periodic Table, which element has 92 protons?

U - Uranium

300

DAILY DOUBLE: 

1. How many half lives have passed if a material goes from a fraction of 1 to 0.0625th of its material remaining?

2. If the half life of this material, according to table N is 5 years, how long will this material have been decaying for?


1 - 1/2 - 1/4 - 1/8 - 1/16

1 - 0.5 - 0.25 - 0.125 - 0.0625


Four half lives pass.

300

Based on the periodic table, what formula represents magnesium (ii) bromide?

(1) MgBr

(2) Mg2Br

(3) MgBr2

(4) Mg2Br3

(3) MgBr2

Think about the CROSS RULE. Mg2+ and Br-1 switch charges when determining the number of each element.

400

Table sugar can be separated from a mixture of table sugar and sand by using which method?

(1) filtration

(2) magnetism

(3) chromatography

(4) distillation at 100 degrees Celsius

(1) distillation


Distillation can separate a solid from a liquid by boiling the liquid. At 100 degrees C, the water boils.

400

Choose a line where only potential energy is increasing.

BC, DE

400

According to the Periodic table, how many valence electrons are in an atom with 12 protons?



An atom with 12 protons is Magnesium.


Magnesium has 2 valence electrons. Valence electrons are the LAST SHELL of electrons in an electron configuration.

400

In which type of nuclear reaction do two atomic nuclei form a single atom with a larger mass?

etc. H + H --> He

(1) Fusion
(2) Fission

(3) Alpha Decay

(4) Beta Decay

(1) Fusion

Two smaller elements combine to form a larger element.

400

What are the names of the two classifications of compounds we learned in class so far?

Hint: One TRANSFERS electrons; one SHARES electrons

Ionic - TRANSFERS electrons

Covalent - SHARES electrons

500

How do we know DE requires more energy than BC, according to the graph?

DE takes more time than BC

500

Based on the number of valence electrons, which ion is Sodium most likely to form? How many electrons will be transferred?

+1 charge; 1 electron will be lost


Sodium has 1 valence electron. Based on the octet rule, it wants to lose that one electron.

The ion formed will have a +1 charge.

500

Complete the following chemical reaction below:


23892U --> 14056Ba + _____ + 310

9336Kr


There are THREE neutrons  --> 238 = 140 + X + 4

                                        --> 92 = 56 + X

500

Balance the following Chemical Equations


__K + __O2 --> __KO3

2K + 3O2 --> 2KO3


Recall - if you are balancing an even and odd number, balance by multiplying the opposite number on each side.

3 x 2 -- 2 x 3

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