1...Which of the following is NOT a metallic property?
A. a hard and brittle texture
B. high density
C. the ability to be flattened and shaped
D. the ability to conduct electricity
2....Which of the following is an example of a diatomic element?
A. NaCL
B. O2
C. Mg
D. CaCl2
3....Which of the following is an example of a single-replacement reaction?
A. Fe + 2HCI -----> FeCl2 + H2
B. Mg + O2 -----> 2MgO
C. 2H2O2 ----> 2H2O + O2
D. CaCl2
2007-05-28 08:32:51 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
a, b, a
2007-05-28 08:35:51 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋
Question 1
A) Hard and Brittle texture- The others are direct properties of Metals: (Dense, Malleable and conductive)
Question 2
B) O2 Which is Oxygen, and Oxygen exists in pairs naturally. A&D are salts. C is a metal with a single atom.
Question 3
A) A single replacement reaction takes place when one element appears to move out of one compound and into another.(One element is replaced by another in a compound.) This is usually written as
A + BX â AX + B or A + BX â AB + X
In this case A= Fe B = H and X= Cl
Therefore A + BX ------> AX + B (Fe + 2HCl ----> FeCl2 + H2)
2007-05-28 08:56:41 · answer #2 · answered by David E 1 · 0⤊ 0⤋
A
B
A
2007-05-28 08:36:09 · answer #3 · answered by steve_geo1 7 · 0⤊ 0⤋