How could the appearance of a substance change with out it becoming a different substance

How can knowing the density of an object tell you if it will sink or float?

Which substance contains metallic bonds (1) Hg (2) H2O (3) NaCL (4) C6H12O6

How many protons are found in the nucleus of a boron 11

Which of the following is the best example of an object absorbing light? A black sweater in the sun B clean window in the sun C A curved mirror in the sun D A long shadow in the sun

which statement accurately describes the charge of the nucleus of an atom? - the nucleus can be either positively charged or neutral. - the nucleus never has an electrical charge. - the nucleus always has a positive charge.

Compound X has the molecular formula C3H6, and Compound Y has the molecular formula C6H12. How are the two compounds related? A. They are made of the same elements, but are different compounds B.

Write a generic Lewis structure for the halogens. Draw the Lewis dot structure for X

Choose the correct statement about an atomic nucleus, compared to an atom as a whole. Choose the correct statement about an atomic nucleus, compared to an atom as a whole. The nucleus is very tiny but has most of the mass.

Four waves are produced when a harp is strummed at four different times. Which wave will produce the highest pitch?

How does sediment form? Chemical changes cause sediment to cement together. Molten rock cools below Earth's surface. Weathering breaks down rock and other material. Loose material is compacted by pressure.