Name:______Date:______Period:____
Thermochemistry Bell Ringers Part 2 – Show all Work
2/28/11 – Review Semester 1 HW Practice
You want to test the effect of vitamins on your dog’s fur. So you start giving your dog vitamins every day. What is the control in your investigation?
A. your dog
B. how often you give your dog vitamins
C. how many vitamins you give your dog
D. There is no control.
You know that there is a difference in how fast gases move based on their size. Given the following diagram and knowledge that each end started at the same time which is the
Faster molecule
Slower molecule
A water purifier removes 99.99% of the lead in water. If a liter of unpurified water contains 3.3 x 1016 lead atoms, how many lead atoms remain in a liter of purified water?
A. 3.3 x 1015 lead atoms
B. 3.3 x 1014 lead atoms
C. 3.3 x 1013 lead atoms
D. 3.3 x 1012 lead atoms
Which method would you use to separate salt from water?
A. magnetism
B. filtration
C. evaporation
D. chromatography
3/1/11 – Mole and Chemical Reaction Balancing Practice
Which of the following is a heterogeneous mixture?
A. soda
B. bronze (a copper and tin alloy)
C. bag of red and pink marbles
D. dental filling (a mercury alloy)
A pea-sized portion of sodium reacts explosively with water. Which other element would you predict to react explosively with water? And WHY?
A. potassium
B. magnesium
C. neon
D. xenon
The elements in the periodic table are arranged by increasing order of which of the following? Define each as well.
A. atomic mass
B. atomic number
C. atomic radius
D. atomic volume
3/2/11 – Concentration Review: M, ppm, percent
Which of the following classifications best describes an element in group 1A?
A. metal
B. metalloid
C. nonmetal
D. transition metal
Elements in groups 3A–8A make up which block of the periodic table?
A. d-block
B. f-block
C. p-block
D. s-block
A valence electron configuration of s2p5 is characteristic of which family of elements?
A. alkali metals
B. alkaline earth metals
C. halogens
D. noble gases
Which of the following period 3 elements has the largest atomic radius?
A. aluminum (Al)
B. chlorine (Cl)
C. phosphorus (P)
D. sodium (Na)
These are the six phase change processes; identify which ones release energy and which ones absorb energy.
(1) Melting
(2) Freezing
(3) Condensation
(4) Vaporization
(5) Deposition
(6) Sublimation
3/3/11 – Thermodynamics GA Video Notes - Substitute
In which group will you find very reactive nonmetals? Name each group.
A. group 1A
B. group 2A
C. group 7A
D. group 8A
Which of the following best describes sublimation?
A. A solid melting to a liquid
B. A solid melting to a liquid, which then evaporates
C. The movement of gaseous particles so that they fill the space they occupy
D. A solid forming a gas
3/4/11 –Quiz and finish Thermodynamics GA Video Notes and Practice – Substitute
Which of the following is the electrostatic force that holds oppositely charged atoms together?
A. lattice energy
B. ionic bond
C. metallic bond
D. delocalized bond
What is the overall charge of a formula unit?
A. one
B. always positive
C. always negative
D. zero
For which of the following is the electron sea model used to explain atomic bonding?
A. ionic compounds only
B. all compounds
C. nonmetals
D. metals
Turn in Bellringer Questions