CHAPTER 2 ATOMS, MOLECULE AND IONS

If an atom has an extra neutron, it is a(n)

• Positive ion
• Negative ion
• Isotope
• Neutral Atom

Tags

NGSS.MS-PS1-1

If an atom gains an electron it is a(n)

• Positive ion
• Negative ion
• Isotope
• Neutral Atom

If an atom loses an electron it is a(n)

• Positive ion
• Negative ion
• Isotope
• Neutral Atom

Can an atom of Hydrogen have 2 protons?

• Yes, because it can be an ion
• No, because protons identify the atom
• Yes, because it can be an isotope
• No, because only neutral atoms exist

Tags

NGSS.MS-PS1-1

What is the IUPAC name of the compound whose formula is (NH₄)₃PO₄ ?

• ammonium phosphate

• triammonium monophosphate

• triammonium phosphate

• ammonium phosphide

Tags

NGSS.MS-PS1-1

Sodium has an atomic number of 11, how many protons does this atom have?

• 22
• 11
• 12
• 2

Tags

NGSS.MS-PS1-1

The following element key shows how many protons?

• 16
• 15.999
• Oxygen
• 8

Tags

NGSS.MS-PS1-1

Which two particles make up the nucleus of an atom?

• Protons and Electrons
• Protons and Neutrons
• Molecules and Compounds
• Neutrons and Electrons

Tags

NGSS.MS-PS1-1

What is at the center of every atom?

• An electron

• A compound

• A molecule

• A nucleus

Tags

NGSS.HS-PS1-8

Which statement correctly describes an electron in an atom?

• Electrons stay inside the nucleus and carry a neutral charge.

• Electrons circle the nucleus and have a positive charge.

• Electrons move around the nucleus and have a negative charge.

• Electrons stay inside the nucleus and have a negative charge.