Which statement describes what is gained or lost during radioactive decay? Atoms gain other atoms.

Elements take in energy.

Atoms lose smaller particles.

Elements gain smaller particles.

only one answer

Which of the following statements is not true? • a. covalent compounds have low melting and boiling points. • ob. covalent bonds between atoms of a compound are relatively weak compared to bonds between molecules. • c. covalent bonds occur between nonmetals. • d. covalent compounds are often gases or liquids.

Write the complete balanced equation for the reaction between lead (iv) oxide (pbo2) and water (h2o).

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space