Apologia Physical Science Module 3 - 3rd edition

Which group is known as the alkali metals?

Columns of the periodic table are called periods.

What does the electron cloud model describe?

What type of particle is a neutron?

a region of space around the nucleus where electrons are most likely to be found

Which group is known as the noble gases?

The atomic number of argon is 18. How many neutrons are there in argon-38?

J.J. Thompson's experiments provided what evidence about atoms?

What must happen for an electron to move to a higher energy level?

matter cannot be created or destroyed, but it can change form

What are the least reactive elements?

What type of particle is a proton?

How does the state of the atoms in a neon light change when the neon light glows?

Halogens react with metals to form salts.

An electron has the same amount of energy in every orbital.

The alkaline earth metals usually form solutions with pH less than 7.

What evidence from Thompson's experiment led him to conclude that glowing beam contained negatively charged particles?

Rows of the periodic table are called groups.

Which elements are all gases?

All of the noble gases except radon are used to make neon lights.

The way electrons are arranged in the orbitals in each energy level is called an atom's electron configuration.

The valence electrons are in the lowest energy level of an atom.

Which of the following is not part of John Dalton's atomic theory?

What is the maximum number of electrons that an atomic orbital can contain?

the number of protons in an atom

There are more electrons in the orbitals of an atom than there are protons in the nucleus of the atom.

What 3 properties can be used to distinguish an electron from a proton?

samples of a pure compound always have the same elements in the same mass proportions

Which group gains 3 electrons and what is the charge of its ions?

What type of particle is an electron?

Which statement describes how electrons move in Niels Bohr's model of the atom?

If an atom of an element has a mass number of 31 & 16 neutrons in its nucleus, what is the atomic number of the element?

Who provided evidence for the existence of a dense, positively charged nucleus in the center of an atom?

The reactivity of the alkali metals decreases as you go down the group.

Halogens are not very reactive nonmetals.

If elements have the same number of valence electrons, they are

Who was the first to argue that all matter was made from indivisible particles called atoms?

the sum of the protons and neutrons in the nucleus of a cell

A sample of sulfur contains ³²S, ³³S, ³⁴S, & ³⁶S atoms. Why do these atoms have different mass numbers but same atomic?

All atoms of an element have the same

The atomic number of argon is 18. How many protons are there in argon-38?

If an atom of germanium has a mass number of 70 and an atomic number of 32, how many neutrons are in the nucleus?

The atomic number of argon is 18. How many electrons are there in argon-38?

What determines an elements chemical properties?

Which of the following is true about the difference between an atom in the ground state and an atom in an excited state?

Which statement about oxygen-17 and oxygen-18 is true?

An atom's lowest energy level has only one orbital.

Aristotle argued that all substances were built from only 4 elements and combination of 4 qualities.

What are the most reactive metals?

Which group is known as the halogens?

Which group has 6 valence electrons?

The elements on the periodic table are arranged by the number of neutrons.

Where is almost all of the mass of an atom found?

atoms of an element with the same number of protons but different numbers of neutrons

Which group is known as the alkaline metals?