Atoms, Elements, Molecules and Compounds

Atoms

1

Atoms are composed of these 3 smaller particles:

What are protons, neutrons, and electrons?

2

Particle with a neutral charge in an atom.

Neutron

3

Center of the atom that makes up most of the atom's mass.

The nucleus

4

The 2 particles located in the nucleus of an atom.

protons and neutrons

5

This particle of an atom has a negative charge and buzzes around the nucleus. 

Electron

Elements

1

How many elements are on the periodic table?

118

2

Chart used by scientists to list all of the elements

Periodic Table

3

What is the symbol for gold? 

Au

4

What element has the symbol Es? 

Einsteinium 

5

What element has the symbol K? 

Potassium 

Molecules

1

Two hydrogen atoms and one oxygen molecule make up one molecule of this.

one molecule of water

2

The number of sodium atom in table salt. Hint: the symbol for table salt is NaCl

What is 1 sodium atom?

3

How many Hydrogen atoms are in CH₃OH? 

4 atoms

4

The definition of a molecule.

What is a particle that contains more than one atom joined together?

5

The number of carbon atoms in carbon dioxide.

What is one?

Compounds

1

How many elements are in this compound: HCO₃

3: Hydrogen, Carbon, Oxygen

2

The chemical symbol for carbon dioxide? 

CO₂

3

How many atoms are in this compound: SiO₂H₄OH

9 atoms

4

What is the formula for carbon dioxide? 

CO₂

5

What are the two elements in this compound: SiCl₆

Silicon and Chlorine

Vocabulary

1

What is the definition of matter? 

Anything that has mass and takes up space. 

2

The 3 states of matter.

What is solid, liquid, gas?

3

What is the smallest particle of matter? 

An atom

4

What do we call 2 or more atoms bonded together? 

Molecule

5

A molecule made of 2 or more elements is called.. 

A compound