The atomic mass of an element can be approximated by adding the number of _______ plus the average number of _______.
What are protons and neutrons?
100
What is the SI base unit for length?
What is meter?
100
In which state of matter are particles the most spread out?
What is gas?
100
A laboratory worker is doing an experiment with rabbits. Every day, she removes the rabbits from their cage in order to administer medication. What should she do after she handles the rabbits?
What is WASH HER HANDS?!
100
Any time a number is used in an observation, that observation is said to be
What is quantitative?
200
The atomic number of an atom is always equal to the number of _______ in an atom.
What are protons?
200
How many TOTAL significant figures would be in the following problem? 97.5m - 0.56m
What is 3?
200
James measures a nail and comes up with 10.5 cm. Julie measures the same nail and comes up with 10.8 cm.
The actual nail measurement is 10.7 cm.
Who is more accurate?
Who is Julie?
200
Ions are charged particles. Therefore, ions must always have an unequal number of
What are protons & electrons?
200
Liquids have a definite volume but not a definite what?
What is shape?
300
To what element does the following electron configuration correspond?
1s2 - 2s2 - 2p5
What is F?
300
Convert 35 mL to L. (MUST SHOW CONVERSION!)
What is 0.035 L?
300
Colin needs to pour 45 mL of vinegar into four separate bowls. He first must measure out exactly 45 mL of vinegar four times.
Which of the following tools will most likely give Colin the most precision in measuring the vinegar?
a 50 mL graduated cylinder or a 25 mL test tube
What is a 50 mL graduated cylinder?
300
Which change in energy level would be the smallest?
n=2 to n=4
n=3 to n=5
n=1 to n=3
n=6 to n=7
What is n=6 to n=7?
300
Bohr's model placed electrons in what part of the atom?
What is stable electron orbits?
400
What information about an element is given by the average of the mass numbers for each naturally occurring isotope, weighted by their relative natural abundance?
What is average atomic mass?
400
Put the following number in scientific notation.
27.5 × 10^10
What is 2.75 x 10^11?
400
If measurements are precise they are
What is close together?
400
Isotopes are atoms of the same element that have a different number of _______.
What are neutrons?
400
Magnesium has 12 electrons, what is its electron configuration?
What is 1s2, 2s2, 2p6, 3s2
500
What shape does an s orbital have?
What is sphere?
500
How many atoms are in two moles of Hydrogen?
What is 1.2044 x 10^24 atoms?
500
This is the term for when measurements are very close or exactly correct.
What is accurate?
500
One mole is equal to the number of atoms in exactly 12 grams of carbon-12. This number (6.02 × 1023 mol-1) is known as
What is Avagadro's number?
500
Name the steps of the scientific method in order.
What is identify a problem, form a hypothesis, test the hypothesis, analyze data, form a conclusion?