What is the difference between an element and an atom?
(There may be more than one correct
answer
Elements can get smaller, but there is
nothing smaller than an atom
An element is a pure substance that
cannot be separated further by normal
chemical means
An atom is a specific type of element
An atom is a building block of matter, aka
the simplest form of matter

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles

Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g c2h2

In november 1987, a massive iceberg broke loose from the antartic ice mass and floated free in the ocean. the chunk of ice was estimated to be 98 mi long, 25 mi wide, and 750 ft thick. a typical backyard swimming pool contains about 24,000 gallons of water. how many of these pools could you fill from the water in this iceberg? (assume the iceberg is a rectangular solid of the above dimensions and consists of water only). express answer in scientific notation.