Question

4* a student is using colored beads to make a model of magnesium hydroxide, mg(oh)2. magnesium atoms are represented by orange beads, oxygen atoms by green beads, and hydrogen atoms by blue beads.
what combination of beads should the student use for the model?
a 1 orange, 2 green, and 2 blue
b 2 orange, 1 green, and 4 blue
c 1 orange, 1 green, and 4 blue
d

Explanation:

Step1: Analyze the formula

The formula \(Mg(OH)_2\) has 1 \(Mg\) atom (orange bead), 2 \(O\) atoms (green beads, since \(O\) in \((OH)\) group, and there are 2 \((OH)\) groups), and 2 \(H\) atoms (blue beads per \((OH)\) group, so 2×2 = 4 blue beads).

Step2: Match with options

Option B (1 orange (for \(Mg\)), 2 green (for \(O\) atoms in 2 \((OH)\) groups), 4 blue (for \(H\) atoms in 2 \((OH)\) groups)) matches the formula \(Mg(OH)_2\) composition.

Answer:

B. 2 orange, 1 green, and 4 blue