Measurement
The unit m3 is used to express
volume
Known for the Law of Definite Proportions
Joseph Proust
Which of the following is a noble gas?
carbon oxygen
sodium neon
neon
A horizontal row of elements in the periodic table is a
period.
Quantitative observations are recorded in the form of
numerical data
The SI base units for length and mass are
meter and kilogram
John Dalton is known for this Law
Law of Multiple Proportions
In developing his periodic table, Mendeleev listed on cards each element’s name, atomic mass, and
properties
Any substance that has a definite composition can be defined as a
chemical
The smallest unit of matter that maintains its chemical identity is an
atom
The number of significant figures in the measurement 0.000 305 kg
3
Known for the Law of Conservation of Mass
Antoine Lavoisier
Mendeleev predicted that the gaps in his periodic table represented these
undiscovered elements
A substance, made of two or more atoms that are chemically bonded, that can be broken down into simpler, stable substances.
compound
A statement that can be tested experimentally is a
hypothesis
Which of the following is a pure substance?
water soil
wood fire
water
Ernest Rutherford is known for discovering this.
nucleus
The periodic law states that the physical and chemical properties of elements are periodic functions of their atomic__________
numbers
This is a blend of any two or more kinds of matter, as long as each maintains its own unique properties.
mixture
These are found moving rapidly outside the nucleus.
electrons
To calculate the number of atoms present in 2.0 mol of an element, you would do this.
multiply Avogadro’s number of atoms per mole by 2.0 mole.
Discovered the electron.
J.J. Thompson
Which noble gas has the greatest atomic number and what is that number?
Rn or Radon 86
A generalization that explains a body of known facts or phenomena.
theory
Neutral atoms contain equal numbers of
protons and electrons