What type of isotope undergoes radioactive decay?

O one that has a nucleus with the same number of protons and neutrons

O one that has an unstable nucleus

one that has the same number of protons and electrons

O one that has a stable nucleus

What is the correct name for Hg (NO3) 2? Mercury (I) nitrate Mercury (II) nitrate Mercury nitroxide Mercury dinitride

Which of the following statements is true concerning biodiversity? Select one: Biodiversity is the lack of a diversity of species in an area Biodiversity is the diversity of species in an area, which makes an ecosystem better prepared for major

Energy released in a chemical reaction come somewhere that is contained in a chemical what

Consider these changes. (a) Hg (l) - >Hg (g) (b) 3O2 (g) - >2O3 (g) (c) CuSo4*5H2O (s) - >CuSO4 (s) + 5H2O (g) (d) H2 (g) + F2 (g) - >2HF (g) At constant pressure, in which of the reactions is work done by the system on the surroundings?

How many grams of h3po4 are in 255 ml of a 4.50 m solution of h3po4?

When metals combine with nonmetals the metallic atoms tend to

Which type of bond forms between water molecules? a. strong bond b. hydrogen bond c. covalent bond d. polar bond

Down syndrome is caused by the presence of an extra copy of chromosome 21. how would a karyotype identify a person with down syndrome? a) ID physical characteristics of someone with the disease.

Which expression is a measurement of denisty

Compare the information provided by a molecules chemical formula to the information provided by its structural formula