Regents Chem Review

Periodic Table

100

On the modern periodic table, the elements are arranged in order of increasing
1) atomic mass
2) atomic number
3) mass number
4) oxidation number

What is Atomic Number?

200

The element found in group 13 and in period 2 is
1) Be
2) Mg
3) B
4) N

What is Boron?

300

As the elements are considered from the top to the bottom of group 15, which sequence in properties occurs?
1) metal —> metalloid—> nonmetal
2) metal —> nonmetal —> metalloid
3) nonmetal —> metalloid —> metal

What is nonmetal, metalloid, metal?

400

Element X is a solid that is brittle, lacks luster, and has six valence electrons. In which group on the periodic table would element x be found
1) 1
2) 2
3) 15
4) 16

What is Group 16?

500

Alkali metals, alkaline earth metals, and halogens are elements found respectively in groups...
1) 1, 2, 18
2) 2, 13, 17
3) 1, 2, 14
4) 1, 2, 17

What is Groups 1, 2, and 17?

Atomic Structure

100

Which particle has a positive charge?

1) electron

2) orbital

3) proton

4) neutron

What is a proton?

200

How does a Br atom form a Br- ion?

1) A bromine atom loses an electron.

2) A bromine atom gains an electron.

3) A bromine atom loses a proton.

4) A bromine atom gains a proton.

What is Bromine gains an electron? 

300

What are patterns made when excited electrons emit light of certain wavelengths?

1)electromagnetic spectra

2)bright line spectra

3)spectroscopes

4)prisms

What is Bright Line Spectra? 

400

What is Niels Bohr responsible for discovering?

1) That electrons are inside the nucleus

2) That electrons are in fixed orbits around the nucleus

3) That electrons are small

4) That electrons are negative

What is electron are in fixed orbits around the nucleus?

500

All of the following of Dalton's theories were correct EXCEPT - 

1) All atoms are identical.

2) All matter is made of atoms.

3) Chemical reactions rearrange atoms.

4) Compounds contain different atoms.

What is all atoms are identical?

Bonding

100

Describe an alloy. 

What is the mixture of metal atoms held together by metallic bonding?

200

Describe a metallic bond. 

What is the sharing of valence electrons between atoms of metal elements?

300

Which statement explains why Br2 is a liquid at STP and I2 is a solid at STP?

A) Molecules of Br2 are polar, and molecules of I2 are nonpolar. 

B) Molecules of I2 are polar, and molecules of Br2 are nonpolar.

C) Molecules of Br2 have stronger intermolecular forces than molecules of I2 . 

D) Molecules of I2 have stronger intermolecular forces than molecules of Br2

What is Molecules of I2 have stronger inter-molecular forces than Molecules of Br2?

400

At standard pressure, CH4 boils at 112 K and H2O boils at 373 K. What accounts for the higher boiling point of H2O at standard pressure?

1)  Covalent Bonding 

2) Ionic Bonding 

3) Hydrogen Bonding

4) Metallic Bonding 

What is Hydrogen Bonding?

500

Describe Network Solids.

What is a compound (or element) in which the atoms are bonded by covalent bonds in a continuous network; have high melting points, crystal structures and do not conduct electricity?

Equilibrium

100

Which form of energy is associated with the random motion of particles in a gas?

A) chemical 

B) electrical

C) nuclear 

D) thermal 

What is Thermal? 

200

Which temperature represents the highest average kinetic energy of the particles in a sample of matter?

1) 298K

2) 267K

3) 27^oC

4) 12^oC

What is 27^oC

300

A) H2O(s) changes to H2O(l) at 0ºC

B) H2O(l) changes to H2O(s) at 0ºC

C) H2O(l) at 10ºC changes to H2O(l) at 20ºC

D) H2O(l) at 20ºC changes to H2O(l) at 10^oC

What is Choice 3?

400

. In a laboratory where the air temperature is 22°C, a steel cylinder at 100.°C is submerged in a sample of water at 40.°C. In this system, heat flows from

A) both the air and the water to the cylinder

B) both the cylinder and the air to the water

C) the air to the water and from the water to the cylinder

D) the cylinder to the water and from the water to the air

What is the cylinder to the water and from the water to the air?

500

At 101.3 kPa and 298 K, what is the total amount of heat released when one mole of aluminum oxide, Al2 O3(s), is formed from its elements?

A) 393.5 kJ 

B) 837.8 kJ

C) 1676 kJ 

D) 3351 kJ

What is 1676 kJ?

Thermochemistry

100

Which of the following is not an endothermic reaction?

a) Decomposition of water

b) Conversion of graphite to diamond

c) Combustion of methane

d) Dehydrogenation of ethane to ethylene

What is the combustion of methane?

200

 Given that

A(s) → A(l) ΔH= +x

A(l) → A(g) ΔH= +y

The heat of sublimation of A will be

a) x-y

b) x+y

c) x or y

d) -x+y

What is B) x + y?

300

The rate of evaporation of a liquid is always faster at a higher temperature because...

1. The enthalpy of vaporization is always endothermic
2. The enthalpy of vaporization is always exothermic
3. The enthalpy of vaporization is zero
4. The internal pressure of the liquid is less than that of the gas

What is the enthalpy of vaporization is always endothermic? 

400

The enthalpy of formation of AgCl is obtained from the enthalpy change from which one of the following process?

1. Ag+(aq) +Cl–(aq) →AgCl(s)
2. Ag(s) + ½ Cl2(g) →AgCl(s)
3. AgCl(s) →Ag(s) + ½ Cl2(g)
4. Ag(s) +AuCl →Au(s) + AgCl(s)

What is 2) Ag(s) + ½ Cl2(g) →AgCl(s)?

500

Given that standard molar enthalpies of formation of NO(g) and NO2(g) are respectively 90.3 kJ/mol and 33.2 kJ/mol. Calculate the enthalpy change for the reaction 2NO(g) + O2(g) →2NO2(g).

What is -114.2 kJ?