Chapter 1
Name the three steps in the scientific method.
Ask a question, construct hypothesis, test with experiment.
Homogeneous.
What is 3,200,000 in scientific notation?
3.2 x 10^6
The smallest particle of an element that retains its identity in a chemical reaction is...
An atom.
How many electrons are in the 2p sublevel of a sodium atom?
6.
Why are collaboration and communication important in science?
To make sure all data is accurate.
Is oil and water a homogenous or heterogenous mixture?
Heterogenous.
How many significant figures are there in 0.0003?
1.
The amount of energy that an electron needs to move from one energy level to the next is called what?
A quantum.
Which sublevel has the greatest energy? 3d, 1s, 3p, and 2d?
3d.
What did alchemists contribute to the development of chemistry?
The tool and techniques for working with chemicals.
A chemical change can break down what?
Compounds into elements.
Convert 50 kg from kilograms to grams.
50,000g.
If a particle has 16 protons and 18 electrons, what would be the overall charge of the particle?
-2.
How many electrons are in the 3p sublevel of a phosphorus atom?
3.
The means by which a society provides its members with things they want and need is...
Technology.
Is carbon dioxide an element, compound, homogenous mixture, or heterogenous?
Compound.
Calculate the number of liters in 435 mL.
How many neutrons are I’m an element with a mass number of 112 and atomic number of 48?
64 neutrons.
Using a periodic table, what is the electron configuration of a fluorine atom?
1s^2, 2s^2, 2p^5
Which of the five traditional areas of study of chemistry would guide a research project about developing new biodiesel fuels?
Organic Chemistry.
How many carbon particles are there for every 2 oxygen particles in CO2?
1.
How many micrograms are in 0.23kg?
2.3 x 10 ^8 micrograms.
True or false: electrons have a negative charge, mass of about 0 amu, and is in the nucleus.
False.
How many electrons are allowed in the third energy level of an atom?
Maximum of 18.