Groups, Periods, and Trends
What is the difference between groups and periods? (which has increasing atomic number/ mass and which has similar properties?)
Groups have similar properties
Periods have an increasing atomic mass
The random molecular motion of a substance is greatest when the substance is:
A. Condensed
B. A liquid
C. Frozen
D. A gas
D. A gas
When cations and anions join, they form what type of chemical bond?
Ionic, Covalent, or Metallic??
Ionic
How many protons does Fe have if it has a mass number of 57?
31
The true value is 9.8. If the results are 7.6, 7.3, 7.5, and 7.5, then the results are:
A. Accurate
B. Precise
C. Neither
D. Both
B: Precise
Generally, how does atomic size vary throughout the periodic table?
Up to down, right to left
Give an example of a chemical change
Lots of correct responses: burning, etc.
An ionic compound is a giant structure of ions called:
A. Ionic structure
B. Covalent Structure
C. Ionic lattices
D. VSEPR
C: Ionic lattices
Which part of the atom is most directly involved in bonding?
the electron
How many total electrons does the iron ion have when it forms the ionic compound FeCl6
A. 26
B. 24
C. 21
D. 20
D. 20
Name one element that has similar properties to Chlorine:
Fluorine, Bromine, Iodine, Astatine, Ts
Which phase change is described correctly?
A. Solid to gas is called deposition
B. Gas to solid is sublimation
C. Liquid to solid is freezing
D. Solid to liquid is vaporization
C: Solid to liquid: Freezing
An ionic bond is formed when one or more electrons are:
A. Equally shared
B. Unequally shared
C. Transferred from one nucleus to another
D. Transferred from the valence shell of one atom to another
D. Valence shell transfer
An element has an atomic number of 8 and a mass number of 19, how many neutrons does it have?
11
The number 0.020 has how many significant figures?
2
Within the p-block elements, the elements at the top of the table compared with those at the bottom,
A. have larger radii
B. Are more metallic
C. Have lower ionization energy
D. Are less metallic
D. Less metallic
Which of the following is a physical change?
Peach spoiling
Copper bowl tarnishing
Bracelet turning your wrist green
Dissolving salt in warm water
Dissolving salt in warm water
Which of the following is an ionic bond? (SELECT ALL THAT APPLY)
NaCl
CO2
KCL
CH4
NaCl and KCl
What is the total number of atoms represented in one molecule of (CH3)2NH
10
How many moles are in 48 grams of Carbon?
4 moles
A. Make computer parts
B. Change atomic makeup of elements
C. Predict properties of new elements
D. Create new elements
C. Predict
Which of the following is most likely a gas?
A. Metal
B. Non-metal
C. Metalloid
D. Lanthanum
B. Non-metal
Which of the following is not a property of an ionic bond?
A. Form crystals
B. Lose an electron
C. Poor conductor of electricity but only when dissolved in water
D. Have high melting points and high boiling points
Poor conductor of electricity but only when dissolved in water
Which idea of Dalton is incorrect? (SELECT ALL THAT APPLY)
A. Atoms are small and tiny
B. Atoms of the same element are identical
C. Atoms can not be destroyed
D. Atoms of different elements combine in simple whole-number ratios to form compounds
B and C
A mass of 32.07 grams of sulfur will have ______ amount of atoms compared to 207.2 grams of Pb.
A. Equal
B. More
C. Less
D. Exactly twice as much
Equal