At around 1510 º C, solid iron changes to its liquid form. This is an example of

Freezing

Melting

sublimation

boiling

Explain why oil is called a fossil fuel.

If you replace the 8 protons in an oxygen atom's nucleus with 8 protons from the nucleus of a gold atom, what kind of an atom would you have?

Monel metal is a corrosion-resistant copper-nickel alloy used in the electronics industry. A particular alloy with a density of 8.80 g/cm3 and containing 0.073% Si by mass is used to make a rectangular plate that is 15.0 cm long, 12.5 cm wide, and 2.

What does the name 2-butene tell you about this hydrocarbon's molecular structure? A. There are two carbon atoms and all single carbon bonds. B. There are two carbon atoms and a double carbon bond. C.

What positions in the ring of a purine nucleotide in DNA have the potential to form hydrogen bonds but are not involed in watson-crick base pairing?

Which is a pure substance A) mixture B) solution C) element

Samuel adds a teaspoon of salt to a glass of water. He notices that the song disappears. Samuel takes a sip to discover that the water taste salty. What kind of change has occurred?

How are the physical and chemical properties of atoms represented on the periodic table of elements

how do we know isotopes exist?

Is albinism a dominant or recessive trait