Chapter 1
Which of the following is a type of quantitative data?
a) mass
b) texture
c) odor
d) shape
What is mass.
Scientists classify matter on the basis of its physical and _______ properties.
What is chemical.
The SI unit that represents the number of particles in a substance is the _______
What is mole
In atomic notation, Z represents the number of ____ in an atom
What is protons
Light is made up of massless particles called _____
What are photons
In the year 2000 there were an estimated 18 million chemical compounds with another estimated 1 million being added each year. Therefore, in the year 2020 there will be 38 million chemical compounds. This is an example of (inductive or deductive) reasoning.
What is inductive.
The amount of matter packed into a given volume determines its ______.
What is density.
The smaller the percent error of a measurement, the more (accurate or precise) the measurement.
The number of protons in an atom's nucleus is its _____
The d sublevel contains this many electrons
What is 10
Chemistry is the study of ______ and the changes that is undergoes.
What is matter.
The first law of thermodynamics is also called the law of ________.
How many significant figures are in the measurement 0.017000 g?
What is 5
J.J. Thomson discovered this type of subatomic particle.
What is electron.
The total number of electrons allowed in a principal energy level is equal to ___
What is 2n2
A workable explanation, description, or representation of a phenomenon in nature is called a scientific _________.
What is model.
Chemical and physical processes that absorb thermal energy are called _______ processes.
What is endothermic
Convert 25,500 g to kg
What is 25.5 kg
Who formulated a new atomic model because of discoveries made during an alpha particle experiment?
Who is Ernest Rutherford
Sulfur has this many valence electrons.
What is 6.
A variable (often denoted by y) whose value depends on that of another.
What is dependent variable.
The ability to do work is called
what is energy
How many significant figures are in the quantity 17 nickels?
What is none.
Two different isotopes of a single element would have the same number of protons, but a different number of _______
What is neutrons
Principles that states that two electrons in the same orbital must have opposite spins
What is Pauli exclusion principle