What type of a reaction takes place when atoms or molecules rearrange to form new substances

Why does the amount of energy received from a small light source decrease as the distance from the light source increase

How do scientists use sonar to study earth's oceans? to measure water density to measure underwater earthquakes to map ocean currents to map the ocean floor

How are elements in the last column of the periodic table similar? A. They are all solids. O B. They are all liquids. C. They react easily. D. They rarely react.

Which statement about the self-ionization of water is correct? Two water molecules interact to form a water molecule and a hydroxide ion. Two water molecules interact to form a hydronium ion and a hydroxide ion.

When a metal bonds with a nonmetal, the bond that is formed is a (n) ___. ionic bond covalent bond chemical bond metallic bond

If an atom has 8 valence electrons, how many electrons does it need to gain to achieve a stable electron configuration?

About how many miles on Earth are equal to one degree of latitude?

What are the allotropes of sulphur And phosphorus?

Particles are measured in

Marcus measured the masses and volumes of samples of four different substances, and he calculated their densities. The table shows Marcus's measured and calculated values. Substance Mass (g) Volume (cm3) Density (g/cm3) aluminum 5.7 2.1 2.