WorksheetsChemistry Knowledge Check
Total questions: 25
Worksheet time: 23mins
What element has the electron configuration of 1s22s22p63s23p4
Sulfur
Phosphorous
Selenium
Chromium
A neutral atom has a ground state electron configuration of 1s22s22p63s23p64s2. The neutral atom becomes an ion during a chemical reaction. Which is the most likely charge of the ion?
1+
2+
1-
2-
Which element will form covalent bonds with Nitrogen?
Potassium
Sodium
Carbon
Iron
Which type of bond/intermolecular force is the strongest?
dipole-dipole forces
London dispersion forces
Hydrogen bonding
Covalent Bonding
What is the chemical formula of the compound iron (II) iodide?
FeI
Fe2I
FeI2
Fe2I2
What is the name of the compound that is NH4HCO3?
Ammonium bicarbonate
Ammonium carbonate
Ammonium hydrocarbonate
Ammonium hydrocarbon trioxide
How many protons does Silver have?
108
47
61
155
How many grams of NaCl do you have if you have 5 moles? (Mass of NaCl is 58.44 g/mol)
292.2 grams
58.43 grams
5 grams
11.69 grams
If a gas in a 4 L container has the pressure of 2 atm, what is the new pressure of the container if the volume is now 1 L?
1 atm
2 atm
4 atm
8 atm
CaSO4 + AlBr3 → CaBr2 + Al2(SO4)3
What will be the coefficient of AlBr3 in a balanced equation?
1
2
3
4
Why does an increase in temperature usually increase the rate of a chemical reaction?
because the activation energy of the reaction increases
because the surface area of reacting particles increases
because the proper orientation of reacting particles improves
because the number of effective collisions between reacting particles increases
If a solution has a pOH of 4, what is the pH of the solution?
4
8
10
12
Which isotope has the greatest number of protons?
Pa-238
U-240
Np-238
Pu-239
What color of light does a hydrogen atom emit when an electron transitions from the n=6 energy level to the n=2 energy level?
orange
yellow
blue
violet
The equation below represents the radioactive decay of a gold isotope.
17479Au → 17077Ir + ?
Which choice correctly completes this equation?
alpha particle
beta particle
photon
neutron
How many electrons are in the outermost energy level of a neutral carbon atom?
2
4
6
8
The compound sodium chloride is placed in water and separates into ions. What are the correct names for these ions?
the chloride and sodium ions are cations
the chloride and sodium ions are anions
the sodium ion is the anion, and the chloride ion is the cation
the sodium ion is the cation, and the chloride ion is the anion
Which statement best compares how bond strength affect the physical properties of iron and lead?
iron has a higher melting point because the bonds in iron are stronger
iron has a higher melting point because the bonds are weaker
lead has a higher density because the bonds in lead are stronger
lead has a higher density because the bonds in lead are weaker
How is copper (Cu) classified based on its location on the periodic table?
a nonmetal
an alkaline earth metal
a transition metal
an alkali metal
Which of the following is an element?
steel
water
titanium
bleach
A neutral atom of a certain element has the electron configuration
1s22s22p63s23p4. How many valence electrons does the atom have?
4
6
11
16
What is the formula for chromium (III) oxide?
CrO
CrO2
Cr2O3
Cr3O2
Which three elements are arranged according to increasing electronegativity
values?
N, C, B
N, P, As
N, O, F
F, O, N
What phase change does a substance go under when it vaporizes?
liquid to solid
solid to liquid
gas to liquid
liquid to gas
Which group of elements is arranged in order of increasing atomic radii?
O, S, Se, Te
Fe, Ni, Ag, Au
Rb, K, Na, Li
Y, Zr, Nb, Mo
