Unit 5 Atom and Periodic Table Post Test

Front

What does Bohr's model of the atom describe?

Back

Bohr's model describes the reactivity of an element based on its number of valence electrons.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

Which types of orbitals are found in the principal energy level n = 3?

Back

s, p, d

Front

Which elements have the same number of valence electrons: oxygen (O) and bromine (Br), selenium (Se) and bromine (Br), carbon (C) and lead (Pb), oxygen (O) and carbon (C), or sodium (Na) and magnesium (Mg)?

Back

carbon (C) and lead (Pb) have the same number of valence electrons.

Front

What is the atomic number and atomic mass of an element with 8 protons, 8 neutrons, and 8 electrons?

Back

The atomic number is 8 and the atomic mass is 16.

Tags

NGSS.MS-PS1-1

Front

How many neutrons are in an atom with atomic number 10 and atomic mass 20?

Back

10 neutrons.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the atomic mass of an element?

Back

The atomic mass is the total number of protons and neutrons in the nucleus of an atom.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that determine its chemical properties.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

What is an orbital in atomic theory?

Back

An orbital is a region in an atom where there is a high probability of finding electrons.