Unit 1 - Atomic Structure & Periodic Table

Identify this element.

• nitrogen

• lithium

• beryllium

• carbon

Tags

NGSS.MS-PS1-1

The three subatomic particles are electrons, protons, and ____________.

• photons

• neurons

• neutrons

• quarks

What is the standard unit of mass at the atomic level?

• micrograms

• millimeters

• AMU

• milligrams

Tags

NGSS.HS-PS1-7

Most of the mass in an atom is made up of _____________________?

• protons and electrons

• protons and neutrons

• neutrons and electrons

• electrons and quarks

Tags

NGSS.MS-PS1-1

What is the electrical charge of a proton?

• 1+
• 1-
• neutral
• 2-

A positively charged particle found in the nucleus of the atom

• Proton
• Electron
• Neutron

Tags

NGSS.HS-PS1-8

This number is represented by the number of protons in the atom

• atomic mass

• atomic number

• mass number

• subatomic particle

Tags

NGSS.MS-PS1-1

The electrons that are on the outer most region of the atom

• shell electrons

• violent electrons

• valence electrons

• negative electrons

The horizontal rows of the periodic table are called ______________________.

• groups

• periods

• families

• rows

What is similar between elements in the same group?

• They have the same atomic mass.

• They have the same number of energy levels.

• They have the same number of valence electrons.

• They have increasing atomic numbers.