UNIT 2 LAB: Build An Atom

As you add protons to the center of the atom, what changes occur? Check all that applies

• Element changes and mass number decreases

• Element stays the same and mass number increases

• Element changes and mass number increases

• Element stays the same and mass number decreases

Tags

NGSS.MS-PS1-1

Add 6 protons to the center of the atom. Then add one neutron. Continue to add neutrons, what do you observe?

• The mass number stays the same.

• The mass number increases.

• Thea mass number does not change

• 4

Add two protons and two neutrons to the center of the atom. Add 1 electron. Continue to add more electrons, what changes occur?

• The net charge decrease

• Nothing happens

• The net charge increases

• The mass increases

Tags

NGSS.MS-PS1-1

Add 2 protons to the center of the atom. Add 2 electron to the center of the atom. What do you notice about the net charge.

• The charge is +1

• The charge is 0

• The charge is -1

• The charge is -2

Add 3 neutrons and 3 protons to the center of the atom. What element is this?

• B

• He

• Li

• Na

Tags

NGSS.MS-PS1-1

Using the information from the previous question, how many electrons are needed to make the atom neutral?

• 0

• 1

• 2

• 3

Add 6 protons and 6 neutrons to the center of the atom. What atom is this?

• C

• N

• O

• Mg

Tags

NGSS.MS-PS1-1

Add 8 protons, 8 electrons, and 8 neutrons to the center of the atom. Note the mass number of the atom and click reset. Add 8 protons, 8 electrons, and 9 neutrons. What happened to the mass number?

• No change

• The mass number increased

• The mass number decreased

• The mass number is 0.

Tags

NGSS.MS-PS1-1

Which subatomic particle has a positive charge?

• proton
• neutron
• electron

Which subatomic particle has a negative charge?

• proton
• neutron
• electron