What is the number of electrons in an atom that has 20 protons and 17 neutrons?

The mass of a proton is approximately equal to the mass of

When a sample of CO2(s) becomes CO2(g), there is a change in (1) bond type (2) gram-formula mass (3) molecular polarity (4) particle arrangement

Which properties are characteristic of Group 2 elements at STP?

(1) good electrical conductivity and electronegativities less than 1.7

(2) good electrical conductivity and electronegativities greater than 1.7

(3) poor electrical conductivity and electronegativities less than 1.7

(4) poor electrical conductivity and electronegativities greater than 1.7

Compared to an atom of C-12, an atom of C-14 has a greater

(1) number of electrons

(2) number of protons

(3) atomic number

(4) mass number

Elements that have atoms with stable valence electron configurations in the ground state are found in

A magnesium atom that loses two electrons becomes a

(1) positive ion with a smaller radius

(2) negative ion with a smaller radius

(3) positive ion with a larger radius

(4) negative ion with a larger radius

An atom of which element has the strongest attraction for the electrons in a bond?

Which type of matter can not be broken down into simpler substances by a chemical change?

According to Table F, which substance is most soluble in water?

(1) AgCl

(2) CaCO3

(3) Na2CO3

(4) SrSO4

Given the equation representing a reaction:

H + H → H₂

Which statement describes the energy change

in this reaction?

(1) A bond is broken as energy is absorbed.

(2) A bond is broken as energy is released.

(3) A bond is formed as energy is absorbed.

(4) A bond is formed as energy is released.

Which sample of matter is a mixture?

Paper chromatography can separate the components of a mixture of colored dyes because the components have differences in

(note: I am grumpy because when we did this in lab/class I mentioned solubility mostly....next year....next year I will mention the other term......)

At standard pressure, the boiling point of an unsaturated NaNO₃(aq) solution increases when

(1) the solution is diluted with water

(2) some of the NaNO₃(aq) solution is removed

(3) the solution is stirred

(4) more NaNO₃(s) is dissolved in the solution

Which term identifies a form of energy?

According to kinetic molecular theory, which statement describes one characteristic of an ideal gas system?

(1) The distance between gas molecules is smaller than the diameter of one gas molecule.

(2) The attractive force between two gas molecules is strong.

(3) The energy of the system decreases as gas molecules collide.

(4) The straight-line motion of the gas molecules is constant and random.

The temperature of a substance is a measure of the

(1) average kinetic energy of its particles

(2) average potential energy of its particles

(3) ionization energy of its particles

(4) activation energy of its particles

A real gas behaves most like an ideal gas at

(1) low pressure and high temperature

(2) low pressure and low temperature

(3) high pressure and high temperature

(4) high pressure and low temperature

A reaction is most likely to occur when the colliding particles have proper orientation and

At STP, a 12.0-liter sample of CH4(g) has the same total number of molecules as

(1) 6.0 L of H₂(g) at STP

(2) 12.0 L of CO₂(g) at STP

(3) 18.0 L of HCl(g) at STP

(4) 24.0 L of O₂(g) at STP

At standard pressure, during which physical change does the potential energy decrease?

(Hopefully you can figure this out, if not this is one the Sesame St method would work for.)

Which equation represents a chemical

equilibrium?

(1) N₂(ℓ) N₂(g)

(2) 2NO2(g) N2O4(g)

(3) CO2(s) CO2(g)

(4) NH3(ℓ) NH3(g)

The amount of randomness of the atoms in a system is an indication of the

(1) entropy of the system

(2) polarity of the system

(3) excited state of the atoms

(4) ground state of the atoms

When a sample of Ca(s) loses 1 mole of electrons in a reaction with a sample of O2(g), the oxygen

(1) loses 1 mole of electrons

(2) loses 2 moles of electrons

(3) gains 1 mole of electrons

(4) gains 2 moles of electrons

Which reaction occurs at the anode of an electrochemical cell?

Which substance is an electrolyte?

(1) CCl₄

(2) C₆H₁₂O₆

(3) SiO₂

(4) H₂SO₄

In which process does a heavy nucleus split into two lighter nuclei?

Which process converts mass into energy?

(1) distillation of ethanol

(2) filtration of a mixture

(3) fusion of hydrogen atoms

(4) ionization of cesium atoms

Which radioisotope is used to determine the age of once-living organisms?

Which electron configuration represents the electrons in an atom of calcium in an excited state?

(this is SPECIFICALLY asking about calcium being excited)

What is the chemical formula of titanium(II) oxide?

Which equation shows conservation of mass and

energy for a reaction at 101.3 kPa and 298 K?

(1) 2H₂(g) O₂(g) → 2H₂O(g) 483.6 kJ

(2) 2H₂(g) O₂(g) → 2H₂O(ℓ) 285.8 kJ

(3) H₂(g) O₂(g) → H₂O(g) 483.6 kJ

(4) H₂(g) O₂(g) → H₂O(ℓ) 285.8 kJ

According to Table G, which substance forms an unsaturated solution when 80. grams of the substance are stirred into 100. grams of H2O at 10.°C?

What is the concentration of AgCl in an aqueous

solution that contains 1.2 103 gram of AgCl

in 800. grams of the solution?

A sample of gas is in a rigid cylinder with a movable piston. The pressure of the gas is kept constant. If the Kelvin temperature of the gas is doubled, the volume of the gas is

What is the amount of heat required to completely melt a 200.-gram sample of H2O(s) at STP?

As a 15.1-gram sample of a metal absorbs 48.75 J of heat, its temperature increases 25.0 K. What is the specific heat capacity of the metal?

Atoms of which element react spontaneously

with Mg²(aq)?

In a titration, 5.0 mL of a 2.0 M NaOH(aq) solution exactly neutralizes 10.0 mL of an HCl(aq) solution. What is the concentration of the HCl(aq) solution?

Compared to a solution with a pH value of 7, a solution with a thousand times greater hydronium ion concentration has a pH value of

This is technically an open ended question on the exam, but I've made it multiple choice for you here.

How can you figure this out you ask? Either look at what TYPE of elements are in the bond or look at their electronegativities

Look at Question 52 for this one. It uses the same picture.

If you are comparing anything even if you don't know take the two things from the question and say something about them

Answer question 54.

Remember the reaction shifts AWAY from what you add. If you are guessing remember you can always guess increase, decrease, stay the same.

I feel like you should know this about chlorine. Technically you can also go find the melting and boiling point on Table S. Convert them to Celsius and then pretend you are Canadian and understand Celsius.

Question 56

Question 57 (There are a few ways to figure this out from the info given. Doesn't matter which way as long as you get the right answer.) Also the order of the elements doesn't matter

Question 58

Since it says answer in term of electrons you can NOT just say because its a metal and a nonmetal.

Question 60

Identify the triad that contains a metalloid.

Explain, in terms of electrons, why the elements in triad 2 have similar chemical properties.

Compare the volume of a 100.-gram sample of the first element in triad 4 to the volume of a 100.-gram sample of the third element in triad 4 when both samples are at room temperature.

(Look at Table S to find the density to be able to do math to answer this.)

Show a numerical setup that demonstrates Dobereiner’s mathematical relationship for triad 2

State evidence from the equation that this reaction is exothermic.

Explain, in terms of substances in the reaction, why the equation represents a chemical change.

Show a numerical setup for calculating the percent composition by mass of carbon in C₆H₁₀O₅ (gram-formula mass  162.1 g/mol).

Balance equation 1 in your answer booklet, using the smallest whole-number coefficients.

Gave this a big time limit because I can't make this multiple choice easily so balance the equation. Add together the coefficients and what do you get:

State the trend in first ionization energy as the elements in triad 3 are considered in order of increasing atomic number.

Explain, in terms of collision theory, why an increase in temperature increases the rate of reaction between methane gas and steam.

State what is represented by interval A on the potential energy diagram.

Determine the number of moles of hydrogen gas required to react completely with 50.0 moles of nitrogen gas in the production of ammonia.

Identify the element in diethyl ether that allows it to be classified as an organic compound.

State the number of electrons shared between the carbon atoms in one molecule of the organic reactant.

State why the reaction is classified as a synthesis reaction

Explain, in terms of the strength of intermolecular forces, why the boiling point of diethyl ether at standard pressure is lower than the boiling point of water at standard pressure.

Draw a structural formula for an isomer of the product that has the same functional group

Explain, in terms of energy, why this cell is an electrolytic cell.

Explain, in terms of ions, why the aqueous solution in the cell conducts an electric current.

State the oxidation number of oxygen in the aqueous product.

Compare the pH value of the solution before the battery is connected to the pH value of the solution after the cell operates for 20 minutes.

Determine the number of neutrons in an atom of Pb-214.

Complete the nuclear equation in your answer booklet for the decay of Po-218 by writing a notation for the missing product.

(The answer book just wants you to fill in the type of decay particle so I am just going to put their names a choices.

Determine the fraction of an original sample of Rn-222 that remains unchanged after 7.646 days. [

Explain, in terms of elements, why the decay of Bi-210 is considered a transmutation