Atomic Structure and Electrons

The charge of an electron is 

• +
• -
• neutral

An element's atomic number is always equal to how many ______________ it has.

• protons 
• neutrons
• electrons
• nuclei

⁴⁸₂₂ Ti
What is the atomic mass # for this element?

• 22
• 48
• 26
• 70

⁴⁸₂₂ Ti
Which of the following list the protons, neutrons, and electrons correctly?

• 22, 26, 22
• 26, 22, 22
• 22, 48, 26
• 26, 22, 26

Tags

NGSS.MS-PS1-1

What is the atomic mass of an element with 40 protons, 40 electrons, and 46 neutrons?

• 80
• 6
• 86
• Not enough information

Tags

NGSS.MS-PS1-1

What element contains 30 electrons and 35 neutrons?

• B
• Br
• Tb
• Zn

Tags

NGSS.HS-PS1-1

Rutherford discovered the...

• electron
• proton
• neutron
• nucleus

Tags

NGSS.HS-PS1-8

J.J. Thomson provided evidence that an atom...

• is the smallest particle of matter
• contains negatively charged particles
• has an overall negative charge
• has an overall positive charge

Tags

NGSS.MS-PS1-1

An ______________ is the same element, with the same number of protons, but different numbers of neutrons

• Atom
• Isotope
• Atomic Number
• Mass Number

Tags

NGSS.HS-PS1-8

How many neutrons does uranium-239 have

• 92
• 147
• 239
• 331

Tags

NGSS.HS-PS1-8