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At the equator
Yes, it does. Because the rate and the concentration are equally related, the biggest the difference in concentration the grater the rate of change of this concentration (osmosis)
because they are all alkaline earth metals and occur naturally in nature.
The gravity of the moon and sun causes the earth's tides. The greatest tides are called 'spring' tides which occur when the earth, moon and sun are aligned. The moon has the greatest effect on our tides because of its proximity.
No- they are too reactive and thus always found in componds and mixtures
No on both points. The lunar eclipse can occur only at Full Moon, and has no connection with the moon's distance from earth.
The alkaline earth metals come from the place that is described in their name: earth. They occur naturally in different types of earth.
metals and non-metals
The solar eclipse can occur only at New Moon, but it has no connection with the moon's distance from earth.
There are a lot more than five. For example, all the alkali and alkaline earth metals are not found naturally in pure form but occur only in compounds. It's actually unusual for a metal to exist in pure form in nature; most of them occur only in compounds.
diffusion is occur when different concentration gradient is applied