periodic table , elements, compounds and mixtures

What is the purpose of the periodic table?

• To organize and predict the properties of elements

• To list all known molecules

• To show the structure of atoms

• To display chemical reactions

What does the atomic number of an element represent?

• The number of electrons in an atom

• The number of protons in an atom

• The number of neutrons in an atom

• The atomic mass of an atom

Which of the following statements is true about the atomic number of an element?

• It changes with different isotopes

• It changes when the element forms a compound

• It never changes for a specific element

• It is the same as the atomic mass

How many protons does hydrogen always have?

• 0

• 1

• 2

• 3

What does the periodic table arrange elements by?

• Increasing atomic mass

• Decreasing atomic number

• Increasing atomic number

• Alphabetical order

Tags

NGSS.MS-PS1-1

Where are elements with similar chemical properties found in the periodic table?

• Randomly scattered

• Close together

• At the top

• At the bottom

What do the rows in the periodic table represent?

• Groups

• Periods

• Families

• Elements

What do columns represent on the periodic table?

• rows

• groups/families

• periods

• metals

What is true about elements in the same column of the periodic table?

• They have different properties.

• They have similar properties.

• They are in different periods.

• They are in different groups.

What is the chemical symbol for Helium?

• H

• He

• Li

• C