Which of the following indicates a chemical change?

Question 7 options:

A. an exploding firecracker

B. a freezing ice cube

C. wood breaking into splinters

D. a wire conducting electricity

What trend in atomic radius occurs down a group on the periodic table

The drawing shows sodium and chloride ions positioned at the corners of a cube that is part of the crystal structure of sodium chloride (common table salt). the edges of the cube are each 0.281 nm (1 nm = 1 nanometer = 10-9 m) in length.

Acid mine drainage results from acidic water formed belowground that makes its way to the surface; the acidic water is formed as a result of the flooding of abandoned mines where the underground watera) reacts with a type of rock, pyrite, which

If the electronegativity difference between the elements in compound n a x is 2.1 what is element X a. Bromineb. chlorinec. fluorined. oxygen

A resistor has a voltage Across it of 3kv and a current through it of 3m A. what is its resistance

Which pair of elements will form an ionic bond? N and O K and Br C and Cl Fe and Ni

What does mass is conserved in a chemical reaction mean

Which atom has a nucleus that contains 13 protons and 14 neutrons 1. Mg 2. Be 3. Al 4. N

Determine the oxidation state of the metal ion in [co (nh3) 5br]2+. express your answer as an integer.

Which functional group contains oxygen atom? a. Carbonyl group b. Amino group c. Sulfhydryl group