Counting Subatomics and Isotopes

An electron has a negative charge and a mass of ___ amu.

• 0
• 1
• .5
• 2

The atomic mass on the periodic table is an average of all the ____ of an element based on abundance.

• protons
• isotopes
• ions
• charges

The number of protons in an element can be found by:

• looking up the group the element is in.
• subtracting the atomic mass from atomic number
• looking up the atomic mass
• looking up the atomic number

Which particles are in the nucleus?

• Protons
• Neutrons
• protons and electrons
• protons and neutrons

How do you calculate the charge of an atom?

• protons - electrons = charge
• protons - neutrons = charge
• its equal to the number of electrons = charge
• protons = charge

What is always different about 2 isotopes of the same element?

• Their number of protons
• Their number of electrons
• Their number of Neutrons
• Their reactivity

When drawing a bohr diagram, the first orbital can hold __ electrons, while the subsequent orbitals can hold __.

• 1, 2
• 2, 4
• 2, 8
• 4, 8

What would the ionic charge of a magnesium ion be?

• Mg²⁺
• Mg⁺
• Mg^2-
• Mg^-

This particle determines the element's identity.

• electron
• proton
• neutron
• valence shell

What does the 1.00794 stand for?

• Hydrogen
• atomic number
• atomic mass
• the mass #

Tags

NGSS.HS-PS1-1