Which element is in group 2 and period 7 of the periodic table

Is H2O considered a molecule or a compound?

You often hear people, particularly sports announcers, talk about a "high rate of speed." What do you think they mean? According to the specific definitions of physics terms, what are they really saying?

What is the place with a high altitude

Biogas majorly contains

Which carbon compound is soft, slippery, a decent electricity conductor, and bonded in a way that forms planes? coal petroleum graphite

The branch of chemistry that is the study of the composition, properties, and reactions of matter is called

According to the article, HOW has the discovery of the Mimivirus influenced scientists' ideas about viruses? А Since it acts differently than other viruses, scientists think it could lead to a vaccine for cancer B.

Consider the two electron arrangements for neutral atoms A and B. Are atoms A and B the same element? A - 1s2, 2s2, 2p6, 3s1 B - 1s2, 2s2, 2p6, 5s1 yes or no

Match the following terms to their correct examples Conduction Convection Radiation Water warming on a stove The sun warming the earth A spoon resting in a cup of tea gets hot

Why are 3 ammonium groups needed for every 1 nitride ion?