TNReady 7th Grade Science Atomic Structure 7.PS1.1

Which of the following makes up the nucleus of an atom?

• protons and neutrons

• protons and electrons

• neutrons only

• protons only

The picture shows a model of a helium atom and a lithium atom. Which of the following statements is true about the lithium and helium atoms?

• Helium has more protons, neutrons, and electrons.

• Lithium is much smaller than helium.

• There is no difference between helium and lithium.

• Lithium has more protons, neutrons, and electrons

Tags

NGSS.MS-PS1-1

The part of an atom that would be found outside the nucleus is the ______.

• neutron

• proton

• electron

• positron

If you want to identify an element, which piece of information would best help you identify it?

• how many protons the element has

• what charge the element has

• how many neutrons the element has

• how many electrons the element has

Within an atom, electrons

• are inside the nucleus and are motionless

• are outside the nucleus and are motionless

• are in motion outside the nucleus

• are in motion inside the nucleus

Neutrons are neutral. This means that

• neutrons are not involved in chemical reactions.

• neutrons do not have a charge.

• neutrons do not have mass

• neutrons are neither acidic or basic.

An uncharged atom has six electrons. The nucleus of this atom must contain _______ protons.

• five

• six

• seven

• eight

Tags

NGSS.MS-PS1-1

A copper wire is made of copper (Cu) atoms. Which of the following best describes the copper atoms?

• They would be mostly the same, but some would have more protons than others.

• They are all basically the same, but the number of neutrons could vary.

• They are all exactly the same.

• They each have different numbers of protons, neutrons, and electrons.

Tags

NGSS.MS-PS1-1

Which of these is the part of an atom that contains the protons and neutrons?

• shell

• nucleus

• orbital

• electron

The _____ of an atom are negatively charged.

• electrons

• negatrons

• neutrons

• protons