Atomic Structure and Properties

What is the mass number of this nucleus?

Tags

NGSS.MS-PS1-1

the central region of an atom where its neutrons and protons are is its 

Tags

NGSS.MS-PS1-1

The ___ of an element is the number of _______ of an atom of that element.

• atomic mass, electrons in the nucleus

• mass number, neutrons in the nucleus

• mass number, protons plus electrons in the energy levels

• atomic number, protons in the nucleus

Tags

NGSS.MS-PS1-1

The atomic number of manganese is 25; its mass number is 55. How many neutrons does an atom of manganese have in its nucleus?

Tags

NGSS.MS-PS1-1

The mass of an electron is ______.

• negligible (so small, we don't count it)

• the mass of the neutrons plus the mass of the protons

• equal to the mass of a proton

• equal to the mass of the nucleus

All matter is made of what?

Tags

NGSS.MS-PS1-1

Atomic mass is composed of what parts of the atom?

• proton

• electron

• neutron

• quarks

Tags

NGSS.MS-PS1-1

• Neutrons = Mass Number + Atomic Number
• Neutrons = Mass Number - Atomic Number
• Neutrons = Atomic Number + Electrons
• Neutrons = Atomic Number - Electrons

Tags

NGSS.MS-PS1-1

How do you find the number of protons

• Find the number of electrons on the periodic table

• Find the atomic mass on the periodic table

• Find the atomic number on the periodic table

• Find the number of quarks on the periodic table

To find the number of neutrons you have to

• Look on the periodic table for the neutron number

• Calculate the neutrons by using mass # and protons

• Calculate the neutrons using Protons and electrons

• Calculate the neutrons by using mass and atomic number