Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.Physical changes occur when objects or substances undergo achange that does not change their chemical composition.
Answer:
Gas State cause the waters boiling point is 100 degrees Celsius
Explanation:
Answer:
A
Explanation:
A hydroxide ion is given as:
OH⁻
The electron dot notation shows only the chemical symbol of the element surrounded by dots to represent the valence electrons. The chemical symbol denotes the nucleus and all electrons except the valence electrons.
The dots are arranged on the four sides in pairs.
Oxygen is made up of 6 valence electrons, and since the ion has a net negative charge, the hydrogen and oxygen achieved their stable configuration this way.
10 * C - low temp, no energy
50 * C - high temp, increased pressure