Atomic Structure and Ions

Look at this picture of Argon off the periodic table. Which of the following is true for this element?

• 18 protons

• 40 protons

• 22 protons

• 21.9 protons

Tags

NGSS.MS-PS1-1

Which of these phrases best describes an atom?

• a positive nucleus surrounded by a hard negative shell

• a positive nucleus surrounded by a cloud of negative charges

• a hard sphere with postive and negative charges on the outside

• a negative nucleus surrounded by protons and neutrons

Tags

NGSS.MS-PS1-1

Subatomic particles that are neutral in charge

• Neutrons

• Protons

• Nucleus 

• Electrons

The charge of the nucleus of all atoms or ions

• positive

• negative

• neutral

• sometimes positive and sometimes negative

The number of these determines which element an atom is.

• neutrons

• electrons

• protons

All atoms of a particular element have the same number of these

• electrons

• neutrons

• protons

What is true about an atom?

• Most of the space in an atom is taken up by the nucleus

• Atoms are mostly empty space

• Atoms have no mass

• Electrons have much more mass that protons or neutrons.

The term "neutral" means

• having only a little bit of charge

• having a positive charge

• having a negative charge

• having no charge at all

Tags

NGSS.MS-PS2-3

How many protons and electrons does this element have?

• 35

• 18

• 17

• 52

Tags

NGSS.MS-PS1-1

The smallest particle of an element.

• Element

• Molecule

• Atom

Tags

NGSS.MS-PS1-1