Chapter 1
Which of the following would be described as a chemical?
sleeping, singing, salt, or energy
What is salt
What is a metric unit of volume?
What is L or mL of kiloliter
A sample of matter that consists of 2 or more elements combined in a set ratio is a sample of a ______?
What is compound?
The elements C, N and O are part of a
period, group or neither?
What is period
The maximum number of electrons that can be accommodated in the principal energy level n=4 is?
What is 32
(2s + 6p + 10 d +14 f)
What are the steps in the scientific method?
What are observations, hypothesis, experiments and theory
How many significant figures are in 105.4 m AND 0.00082 g?
What is 4 and 2
Fill in all 3 blanks with the choices solid, liquid or gas:
___ has a definite volume, but takes the shape of the container.
___ does not have a definite shape or definite volume.
___ has a definite shape and a definite volume.
What are liquid, gas and solid
What is the group number of the element with atomic number 3?
What is 1A (1)
Silicon has ___ valence electrons and Oxygen has ____ valence electrons.
What are 4 and 6
Identify as an observation, hypothesis or experiment:
More sugar dissolves in 50 mL of hot water than 50 mL of cold water.
What is observation?
Round 3486.512 to 3 sig figs
3490
The melting point of gold is 1064 degrees Celsius. The Fahrenheit temperature needed to melt gold would be?
What is 1947 degrees F
4 parts! Consider an atom with 12 protons and 13 neutrons:
The atomic # is ____?
This atom has a mass number of ____?
This is an atom of the element ____?
The number of electrons in this atom is ___?
What are 12, 25, Mg, and 12
Draw an electron dot diagram for a potassium atom?
What is .K
Identify as an observation, hypothesis or an experiment:
Samples containing 20 g of sugar are each placed separately in a glass of cold water and a glass of hot water.
What is experiment
Three liquids have densities of 1.15 g/mL, 0.79 g/mL, and 0.95 g/mL. When the liquids, which do not mix, are poured into a graduated cylinder, the liquid at the top is the one with the density of what?
What is 0.79 g/mL
The average daytime temperature on the planet Mercury is 683 K. What is this temperature on the Celsius scale?
What is 410 degrees Celsius
4 parts! Elements in Group B are called ____ elements. Group 8A are known as _____. Group 7A are called the ____ and elements in 2A are known as ____metals.
What are transition, noble gases, halogens and alkaline earth metals
Draw the electron dot diagram for Magnesium and Oxygen
Mg with 2 dots not on same sides and O with 2 dots on 1 side, 2 dots on another side, and 1 dot each on the last two sides.
What is the textbook definition of chemical?
What is a substance that has the same composition and properties wherever it is found
A sample of oil has a mass of 65 g and a volume of 80.0 mL. What is the density in g/mL of the oil?
What is 0.81g/mL
Fill in the 3 blanks with physical or chemical change:
___ Butter melts in a hot pan.
___ Iron forms rust with oxygen.
___ Baking powder forms bubbles as a cake bakes.
What are physical, chemical, chemical
Which of the following is an isotope of N?
148N, 73N, 105N, 42He, 157N
What is 157N
What is the electron configuration for aluminum?
What is 1s22s22p63s23p1