Midterm Review #1

What is the charge of the strontium ion?

• +1
• +2
• +3
• +4

Under what conditions can KBr conduct electricity?

• only in crystal form
• only when melted
• only when melted or dissovled
• only when dissolved

Which of the following represents a compound?

• H₂O
• H-3
• H
• O-16

As you move from left to right across the periodic table

• atomic mass decreases
• atomic radii increases
• electronegativity decrease
• ionization energy increases

Metals lose their electron and become

• larger and positively charged
• Larger and negatively charged
• smaller and positively charged
• smaller and negatively charged

How many valence electrons does Iodine have?

• 1
• 3
• 5
• 7

2H_29(g) + O_2(g) = 2H₂O_(g) which way will it shift if the pressure is increased

• makes more hydrogen

• makes more oxygen

• no affect

• makes more water

What is the formula for aluminum oxide?

• Al₃O
• AlO₃
• Al₂O₃
• AlO

What is the next atomic orbital 1s, 2s, 2p, 3s, 3p

• 3d
• 2d
• 4s
• 3f

What change in the atomic number is seen in gamma radiation?

• remains the same
• decreases by 2
• increases by 1
• decreases by 1