6th grade science what

The 6 th period consists of elements that have atomic numbers 58 to 71. They are called Lanthanides. The 7 th period consists of elements that have atomic numbers 90 to 105. They are called Actinides. Both of them are called inner transition elements. Lanthanides an..

Chemical Reactions and Equations - A physical change is one in which the shape, size, appearance or state, of a substance may alter, but its chemical composition remains same.A change in which the composition of a substance is altered is called as chemical chang..

Keeping the prevailing model in mind (Thomson's 'raisin pudding') the cloud of positive electricity should offer little resistance to the passage of alpha particle even though the latter is charged. The reasoning is that alpha particles are moving at high speed and have a great amount of forward m..

A base is a substance, which on dissolving in water yields hydroxyl ions (OH-) as the only negative ion..

Solar energy is responsible for the blowing of wind. The intensity of sun-rays is stronger near the Equator than at the Polar Regions. Due to unequal heating of the earth's surface, cooler air from the Polar Regions flow towards the equatorial regions to fill the space created by the hot rising a..

There is a cotton-like black coloured growth on the brea..

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