Chapter 1
The study of the composition and structure of matter, including the changes it undergoes
What is chemistry?
The closeness of a measurement to the accepted value.
What is accuracy?
The sum of the protons and neutrons in the nucleus.
What is mass number?
The electrons in the outermost energy level.
What are valence electrons?
Developed the quantum mechanical model of the atom.
Who is Erwin Schrodinger?
The trend in atomic radius from left to right.
What is decreasing?
Formed by a sea of electrons that moves between metal cations.
What is a metallic bond?
The branch of chemistry that focuses on the study of compound that contain carbon.
What is organic chemistry?
A vertical column of elements on the periodic table.
What is a group?
Write the nuclear symbol for an atom of uranium that has 146 neutrons.
23892U
The shape of p orbitals.
What is dumbbell shaped?
Occurs when light strikes a metal and ejects electrons.
The charge of ions formed from Group 6A elements.
What is -2?
A mixture of two or more elements, one of which is a metal.
What is an alloy?
What is a theory?
What is the relationship between the mass of starting materials and ending materials in any chemical and physical change.
They are equal.
Atom 1: 15 protons, 18 neutrons, 15 electrons
Atom 2: 15 protons, 15 neutrons, 15 electrons
What is the relationship between the two atoms?
They are isotopes.
According to Bohr's model, electrons travel in a specific path with a specific ___.
What is energy?
This occurs in an atom that causes it to emit light and create a line-emission spectrum.
What is electrons drop from a high to a lower energy level?
Elements in group 2A.
What are alkaline earth metals?
The number of oppositely charged ions surrounding a particular ion in an ionic compound.
What is coordination number?
Identify the chemical change.
A. sharpening a pencil
B. slicing a loaf of bread
C. puddle dries up
D. leaf changes color
What is D) leaf changes color?
Multiply 7.21 m and 2.4 m and record the answer to the correct number of significant figures.
17 m2
Convert 35 mL to L.
0.035 L
The number of sublevels that are allowed in the 4th energy level.
What is 4?
The relationship between wavelength and frequency.
What is inversely proportional?
The more reactive group of elements:
A. Group 1A
B. Group 2A
C. Group 3A
What is A) Group 1A?
Conditions under which ionic compounds conduct electricity.
What are melted and dissolved in water.
Property that depends on the substance rather than the amount present and may be used to identify a substance.
What is an intensive property?
The particle discovered during the cathode ray tube experiment.
What is the electron?
The mass of a 100 cm3 piece of aluminum which has a density of 2.7 g/cm3.
What is 270 g?
The energy level and sublevel to be filled after the following: 1s2s2p3s3p4s
What is 3d?
All forms of electromagnetic radiation have this in common.
What is the same speed?
The groups of elements in the p block.
What are Groups 3A through 8A?
What is an ionic compound?
A physical blend of two or more types of matter in which each substance retains its own properties.
What is a mixture?
The part of the atom discovered by Rutherford during the gold foil experiment.
What is the nucleus?
Write 0.0004510 in scientific notation.
What is 4.510 x 10-4?
Describes the sublevels of atoms that are stable.
What is full or half-full?
Write the electron configuration, noble gas configuration, and orbital notation for silicon, Si
1s22s22p63s23p2
[Ne]3s23p2
Type of element that is a good conductor of heat and electricity.
What is a metal?
The electron configuration for the O2- ion.
What is 1s22s22p6?