Atoms are electrically neutral because there are an equal number of protons in the nucleus and in the cloud around the nucleus

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.

1 - wave length

2 - amplitude

3 - crest

4 - trough

explanation:

duh.

measure their densities same density, same sub