What could be inferred about atomic structure after the discovery of the electron?
Select all correct answers.
A. Atoms are made up of smaller "subatomic" particles,
B. Atoms of different elements contain the same number of electrons.
C. The electrons in an atom are attracted to each other due to their negative charge,
D. Atoms must also contain a positively charged component.

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes