Chemistry: Elements & the Periodic Table

The atomic number of the periodic table indicates the

• number of protons in an atom

• number of neutrons in an atom

• number of electrons in an atom

• number of protons and electrons in an atom

Bromine, chlorine, and flourine are part of a family called

• alkali metals

• lanthanides

• halogens

Which of the following statements about transition metals is true?

• They include familiar metals such as gold, silver, copper, and nickel

• They are so soft that they can be cut with a knife

• They are never found uncombined in nature

Which particles in atoms have a negative electric charge?

• protons

• electrons

• neutrons

Which property of bromine could you NOT predict based on the fact that it is a nonmetal in the halogen family?

• highly reactive

• poor conductor of electricity

• liquid at room temperature

If an element is in the same column of the periodic table, then the elements share

• different properties

• similar properties

• the same atomic number

The elements in a row of the periodic table

• are in the same family

• have the same or nearly the same properties

• have properties that change in a pattern

In the periodic table, the most reactive metals are found

• in Group 1, the first column on the left

• in Groups 13 through 16 in the center

• in Period 1, the first row across the top

Which parts of the atom move around the nucleus?

• atomic mass units

• electrons

• protons

Most synthetic elements are created from powerful machines called

• supernovae

• particle accelerators

• semiconductors

Tags

NGSS.MS-PS1-3