Atoms, Ions, and Properties of Water

Matter is?

• Anything that is big

• The smallest unit of matter

• Anything that has mass and takes up space.

• A positively charged ion

Water is polar because

• the molecule has two poles, at which it is colder than the other regions of the molecule.

• the water molecule is neutral.

• the unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. 

• the unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.

Which particle is found in the nucleus and has no charge?

• electron
• neutron
• proton
• atom

Which negatively charged particle moves around the nucleus of an atom?

• neutron
• proton
• electron 
• ion

Tags

NGSS.MS-PS1-1

The number of protons that an atom has is the

• atomic symbol.

• atomic number.

• atomic mass.

• mass number.

What are the smallest basic units of matter?

• molecules

• atoms

• elements

• ions

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What type of bond is formed between atoms of different charges? (gain or lose electrons)

• Covalent

• Compound

• Ionic

• Hydrogen

What subatomic particles are found in the nucleus and have a positive charge?

• Protons

• Elements

• Neutrons

• Electrons

Atoms share pairs of Electrons in what kind of bond

• Covalent

• Ionic

• Electrical

• Cohesive

An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?

• 15

• 31

• 16

• 47

Tags

NGSS.MS-PS1-1