Question 107 20 You find a clear gem that is made of one substance. What could you do to identify whether the gem is a diamond?
A. Determine its shape and compare it to the shape of other gems, including diamonds.
B. Determine its melting point and compare it to the melting point of other gems, including diamonds.
C. Measure its length and compare it to the length of other gems, including diamonds.
D. Measure its mass and compare it to the mass of other gems, including diamonds.
Select an answer
Back
Open notes navigator
S
e
Lo

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6