Atomic Structure

Which of the following describe the subatomic particles correctly?

• Electron has -1 charge and proton has a +1 charge.

• Neutron has a +1 charge and electron has a mass of 1/1840.

• Proton has a +1 charge and neutron has a mass of 1/1840.

• Electron has a +1 charge and electron has a mass of 1.

Atoms of the same element with a different number of neutrons are called _______.

• Ion

• Gluons

• Isotope

• Quarks

What is proton (atomic) number?

• Number of protons in the nucleus of an atom

• Number of neutrons in an atom

• Mass of an atom

• Charge on an atom

Which subatomic particles are found in the nucleus of an atom?

• Protons and Electrons
• Protons and Neutrons
• Neutrons and Electrons
• Protons, Neutrons and Electrons

Tags

NGSS.MS-PS1-1

How many protons does an aluminium atom have? (Use the image to help you)

• 27
• 14
• 40
• 13

Tags

NGSS.MS-PS1-1

The total number of protons and neutrons in an atom is called the...

• Atomic number

• Proton number

• Mass number

• Nucleus number

How many neutrons does a sodium atom have? (Use the image to help you)

• 23

• 11

• 12

• 34

Atoms of the same element must always have the same number of _________

• electrons
• neutrons
• isotopes
• protons

For an atom to be electrically neutral, it must contain the same number of _____

• protons and neutrons
• neutrons and electrons
• protons and electrons
• nucleons and electrons

Tags

NGSS.MS-PS1-1

Which of the following electronic configurations will form a negative ion with charge of 2-?

• 2,8,2

• 2,8

• 2,6

• 2,1

Answer explanation

Non-metal atom gains electron to form negative ion!