Write one physical and one chemical property of iron and explain why understanding these properties is important

What causes surface tension under water

What does the atomic number represent? O A. The number of neutrons in the nucleus O B. The number of protons and neutrons in the nucleus c. The number of protons in the atom's nucleus O O D. The number of electrons orbiting the nucleus SU

Which is true regarding covalent substances placed in water? A. Covalent substances conduct electricity very well in water. B. The molecules aren't separated from one another by water molecules. C.

Write the following as a ratio in the simplest form: 15 winners out of 120 raffle entries.

The number of neutrons in one atom of mercury with mass number 204 is:

Blank is the theory that explains how large pieces of earths outermost layer move and change shape

Describe the energy transformation that occurs in a clock

Electronegativity tends to tends to increase from left to right across a row., becasue

Which formula equation shows a reversible reaction? 2 upper N a plus upper F subscript 2 right arrow 2 upper N a upper F. Upper C a upper C upper O subscript 3 right arrow upper C a upper O plus upper C upper O subscript 2.

Sprite: When mixed with red cabbage water, resulting solution turned red. Watermelon juice: When mixed with red cabbage water, resulting solution turned pink/purple. Egg whites: When mixed with red cabbage water, resulting solution turned green.