Atoms and P. Table Lesson

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READ the next two slides carefully to help you answer questions later.

​Read this and remember the difference in an atom and an element.
Atom:
smallest unit of matter that is made up of protons, neutrons, and electrons.

You need to know the LOCATION and CHARGES of protons, neutrons, and electrons.

READ THIS to remember for a question:
Element:
atoms that all have the same number of protons in their nucleus.  There are 118 of them on the periodic table. They are made of the same kinds of atoms.

Multiple Choice

What is the difference in an atom and an element?

• An atom is a group of different elements combined together.
• An element can exist as a single atom only.
• An atom is a single unit of matter, while an element is a substance made of one type of atom.
• Atoms are larger than elements in size.

Multiple Choice

A student creates a model to compare the locations and charges

of electrons, protons, and neutrons.

Which model accurately represents each subatomic particle?

Multiple Choice

Which statement is true about the nucleus of an atom?

• The nucleus contains electrons and neutrons, and it has a negative net charge.

• The nucleus contains electrons and protons and it has a neutral net charge.

• The nucleus contains protons and neutrons, and it has a neutral net charge.

• The nucleus contains protons and neutrons, and it has a positive net charge.

Multiple Choice

Which particles are located in the nucleus?

• neutron and electron

• proton and

  electron

• proton and

  neutron

• only protons

• only neutrons

Hotspot

Which one is a valence electron?

Hotspot

Which one is the nucleus?

Multiple Choice

Where would a proton be placed in this model that a student made of an atom?

• inside the nucleus

• on either of the two orbits

• between the two orbits

• between the first orbit and the nucleus

Multiple Choice

the smallest unit of matter made up  of protons, neutrons, and electrons

• atom

• element

• molecule

• compound molecule

Multiple Choice

atoms that all have the same number of protons in their nucleus

• atom

• element

• molecule

• compound molecule

Multiple Choice

How many protons will lithium have in its nucleus?

It will also have this number of electrons if it is a neutral atom.

• 7

• 3

• 4

• 6

Multiple Choice

How many neutrons will lithium have?

• 7

• 3

• 4

• 6

Multiple Choice

How many protons and electrons in a neutral atom of Krypton?

• 83

• 84

• 48

• 36