Atomic Structure and The Periodic Table

How do the charge and mass of an electron compare to the charge and mass of a proton?

• An electron has the same charge, but a smaller mass than a proton

• An electron has the same charge and the same mass as a proton

• An electron has the opposite charge and the same mass as a proton.

• An electron has the opposite charge and a smaller mass than a proton.

The mass of a proton is much greater than an electron.

• True

• False

How many electrons does Cl¹⁻ have?

• 17

• 18

• 35

Tags

NGSS.MS-PS1-1

Each element is unique because each element has a different number of

• Neutrons

• Electrons

• Protons

If a Fluorine atom has a mas number of 19, how many neutrons does it have?

• 10

• 19

• 9

• None of the above

Tags

NGSS.MS-PS1-1

We call it Dalton's Atomic Theory because he used which part of the Scientific Method?

• Unlike Democritus, he was able to observe actual atoms with a microscope.

• He used the Gold Foil experiment

• He tested his hypothesis by experimenting.

• None of these

Which statement about electrons is FALSE?

• Electrons have very little mass compared to protons.

• Electrons have an equal BUT opposite charge than protons.

• Electrons carry a negative charge.

• Electrons are found in the nucleus

Thomson experimented with the Cathode Ray tube and discovered the electron. What was NOT a part of his hypothesis?

• Electrons have a negative charge.

• Electrons orbit the nucleus.

• Electrons must be in all elements.

• Electrons have little mass.

Tags

NGSS.MS-PS1-1

Isotopes are atoms that have the same element but differing mass numbers.

• True

• False

An isotope of Carbon has 6 protons and 8 neutrons. The name of this isotope is:

• Carbon - 12

• Carbon - 13

• Carbon - 14

• None of the above

Tags

NGSS.MS-PS1-1