Combining Atoms Review

Select the statement that describes an element

• a type of atom that has a positive charge.

• matter that cannot be broken down into simpler substances

• a compound made up of two or more different types of atoms.

• a form of energy that can be transferred or converted.

How are elements grouped on the periodic table?

• Based on their atomic mass.

• Based on their state of matter

• Based on their location in the periodic table.
• Based on similar chemical properties and characteristics.

Moving from left to right across the periodic table, _______ increases by 1 per element.

• atomic radius
• atomic mass
• atomic symbol

• atomic number

Which of the following are considered compounds?

• Oxygen (O)

• Iron (Fe)

• Magnesium (Mg)

• Water (H2O)

Tags

NGSS.MS-PS1-1

what happens to the properties of hydrogen and oxygen when they form the compound H ₂ O?

• The properties of hydrogen and oxygen change when they form the compound H2O.
• The properties of hydrogen and oxygen become more deadly.

• The properties of hydrogen and oxygen are destroyed

• The properties of hydrogen and oxygen remain the same

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

a chemical combination of two or more of the same type of atom is a _______.

• element
• ion
• compound
• atom

Why is water not found on the periodic table?

• Water is a chemical element.

• Water is not found on the periodic table because it is a compound.
• Water is not a gas.
• Water is not a solid.

What is the atomic number of an element?

• The number of protons in the nucleus of an atom.

• The number of neutrons in the nucleus of an atom.

• The number of electrons in the outermost shell of an atom.

• The number of atoms in a molecule.

Select the example of a pure substance

• Brass

• Salt Water

• Air
• Nitrogen Gas

Tags

NGSS.MS-PS1-4

Which of the following is an example of a heterogenous mixture?

• Tomato Soup

• Orange juice
• Mashed potatoes
• Salad