Periodic Table & Trends
According to the current periodic law, elements on the Periodic Table are arranged in order of their
A) Atomic mass.
B) Atomic number.
C) Number of electrons.
D) Number of neutrons.
B) Atomic number.
Which density is expressed correctly to three significant figures?
A) 0.13 g/L
B) 304 g/L
C) 506.0 g/L
D) 720 g/L
B) 304 g/L
Scientists often start testable questions with phrases like:
A) Why is…?
B) What happens if…?
C) Who invented…?
D) When did…?
B) What happens if…?
Which product of a radioactive decay process is considered least dangerous?
A) An alpha particle
B) A beta particle
C) A gamma ray
D) A nucleotide
A) An alpha particle
The dots in a Lewis dot structure represent ________.
A) Neutrons.
B) Protons.
C) Valence electrons.
D) Valence protons.
C) Valence electrons.
Elements in a group of the periodic table are described below.
Atoms contain seven valence electrons. Poor conductor of electricity. Brittle in the solid state. Low melting points.
The elements described above belong to which group?
A) Alkaline earth metals
B) Noble gases
C) Alkali metals
D) Halogens
D) Halogens
Which of the following is the best way to clean your hands after using chemicals in a laboratory experiment?
A) Rinse your hands with distilled water.
B) Use a generous amount of hand sanitizer.
C) Wash your hands with soap and water.
D) Wipe your hands with a wet paper towel.
C) Wash your hands with soap and water.
Which of these is an example of qualitative data?
A) The water has a volume of 100 mL.
B) The temperature is 75∘C.
C) The sample has a sour taste.
D) The car travels at 50 km/h.
C) The sample has a sour taste.
Which of the following is the product of nuclear decay that has neither mass nor charge?
A) Neutrons
B) Alpha Particles
C) Gamma Rays
D) Beta Positrons
C) Gamma Rays
How many Valence Electrons does Phoshurus have?
A) 1
B) 2
C) 4
D) 5
D) 5
Which of the following is the most reactive nonmetal?
A) Carbon
B) Fluorine
C) Nitrogen
D) Oxygen
B) Fluorine
Which of the following best describes the safest way to dilute a highly concentrated acid?
A) Slowly add water to the acid in small increments.
B) Slowly add the acid to water while stirring gently.
C) Add a volume of diluted acid to the concentrated acid.
D) Quickly add water to the acid while stirring vigorously.
B) Slowly add the acid to water while stirring gently.
Which variable is the one that the scientist changes in an investigation?
A) Dependent variable
B) Constant variable
C) Independent variable
D) Control variable
C) Independent variable
Which of the following is correct?
A) Nuclear fusion is occurring because many smaller nuclei are being fused.
B) Nuclear fission is occurring because large amounts of energy are being absorbed.
C) Nuclear fusion is occurring because many energetic neutrons are being emitted.
D) Nuclear fission is occurring because a nucleus is being split into smaller nuclei.
D) Nuclear fission is occurring because a nucleus is being split into smaller nuclei.
Which compound should be classified into each molecular geometry category?
CO2, H2O, NH3, CH4
Linear, Bent, Trigonal pyramid, Tetrahedral
A) Linear: CO2
B) Bent: H2O
C) Trigonal Pyramid: NH3
D) Tetrahedral: CH4
Using the Periodic Table, predict which elements will have similar chemical properties or reactivity.
A) Cadmium, calcium, and carbon
B) Magnesium, strontium, and barium
C) Rubidium, yttrium, and zirconium
D) Nitrogen, sulfur, and bromine
B) Magnesium, strontium, and barium
Which volume is expressed to exactly three significant figures?
A) 400 mL
B) 20.0 mL
C) 0.90 mL
D) 0.03 mL
B) 20.0 mL
Which of these best shows a non-investigable question?
A) How does the concentration of salt affect the freezing point of water?
B) What is the meaning of life?
C) How does temperature affect solubility of sugar?
D) What happens if we increase pressure on a gas at constant temperature?
B) What is the meaning of life?
What type of radioactive particle is emitted as the product of the decay process below?
A) Alpha
B) Beta
C) Delta
D) Neutron
B) Beta
What type of bonds are formed when atoms of sulfur and phosphorus react?
A) Binary
B) Covalent
C) Ionic
D) Molecular
B) Covalent
On the Periodic Table, what are the group and period trends in ionization energy (IE)?
A) IE increases down a group and increases from left to right across a period.
B) IE increases down a group and decreases from left to right across a period.
C) IE decreases down a group and decreases from left to right across a period.
D) IE decreases down a group and increases from left to right across a period.
D) IE decreases down a group and increases from left to right across a period.
Which quantity is expressed correctly to exactly five significant figures?
A) 0.0031 mol
B) 00.506 mol
C) 2890.0 mol
D) 10500 mol
C) 2890.0 mol
Which variable is measured in an investigation?
A) Dependent variable
B) Control group
C) Constant
D) Independent variable
A) Dependent variable
For the most common forms of radioactive decay particles, the order of most dangerous to least dangerous is:
A) Alpha, beta, gamma.
B) Beta, gamma, alpha.
C) Gamma, alpha, beta.
D) Gamma, beta, alpha
D) Gamma, beta, alpha.
Which of the following has the lowest ionization energy?
A) Beryllium
B) Carbon
C) Lithium
D) Nitrogen
C) Lithium