Chemistry revision gr 9

What is another name for the representative elements?

• Group A elements

• Group B elements

• Group C elements

• transition elements

What is another name for the transition metals?

• noble gases

• Group A elements

• Group B elements

• Group C elements

Which of the following statements is true about ions?

• Anions are positively charged ions.

• Cations are common among nonmetals.

• Charges for ions are always written as numbers followed by a plus or minus sign.

• When an anion forms, more electrons are transferred to it

The metals in Groups 1A, 2A, and 3A

a.

b.

c.

d.

• gain electrons when they form ions.

• all form ions with a negative charge.

• all have ions with a 1 charge.

• lose electrons when they form ions.

What is the element with the lowest electronegativity value?

• cesium

• helium

• calcium

• fluorine

Which of the following atoms would you expect to have the largest atomic radius?

• Li

• K

• Rb

• Cs

The tendency of an atom to attract electrons when the atom is in a compound is called_____.

• ionization energy

• electronegativity

• atomic size

• conductivity

A metallic bond is a bond between____________.

• valence electrons and positively charged metal ions.

• the ions of two different metals.

• a metal and nonmetal.

• none of the above

How many valence electrons are in an atom of potassium?

• 1

• 2

• 3

• 4

An anion is any atom or group of atoms with______________.

• a positive charge.

• no charge.

• a negative charge.

• less electrons than the corresponding atoms