Modern Atomic Theory

A region in space around the nucleus where an electron is likely to be found is a(n) ____.

• nucleus

• empty space

• orbital

• hiding space

The correct number of electrons in the first 3 energy levels is: ____.

• 1, 3, 6

• 2, 4, 8

• 2, 8, 12

• 2, 8, 18

By measuring the energy gained when electrons absorb energy and move to higher energy levels or the energy released when the electron moves to a lower energy level was evidence for the ____ Model

• Probability

• Orbital

• Bohr

• Rutherford

An electron can move from one ____ to another when the atom gains or loses energy.

• address

• time zone

• energy level

• model

Tags

NGSS.HS-PS1-1

What scientist first developed 4 rules for atomic theory, and helped kick start modern chemistry?

• J.J. Thomson

• Ernest Rutherford

• John Dalton

• Democritus

Who developed the atomic theory? (a)  

• Dalton

• Thomson

• Chadwick

• Rutherford

When all the electrons in an atom have the lowest possible energies, the atom is said to be in its ground state. When electrons are NOT all in the lowest possible energies it is the ____ state.

• energy

• high

• happy

• excited

The ____is a visual model of the probable locations of electrons in an atom. It uses % chance when trying to predict the locations and motions of electrons in atoms.

• Bohr model

• electron cloud model

• Rutherford model

• Thomson model

An electron configuration is the arrangement of electrons in the orbitals of an atom.

• True

• False

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following best describes the location of protons in an atom?

• In the electron cloud.

• In the nucleus.

• Orbiting the nucleus.

• In the outer shell.

Tags

DOK Level 1: Recall