Questions

A metalloid is any chemical element which has properties in between those of metals and nonmetals, or that has a mixture of them.

The six commonly recognised metalloids are

boron,

silicon,

germanium,

arsenic,

antimony, and

tellurium.

An Umbrella.

Yes, when it is open it can't be fit under a chimney but when it is closed it can be fit down a chimney.

Competition  occurs when two or more organisations act independently to supply their products to the same group of consumers.

There are mainly two cases when firms can compete. One is price where firms are selling identical or very similar products, they must compete on price with each firm trying to undercut the others. The other is differentiation. A non-price competition depends on making a product different from those of competitors and by giving it distinctive qualities that are valued by the target market. This might include branding, styling, special features or higher levels of customer service. Good competition provides more options to customers and also brings with it improved  customer services.

 Capital of Kazakhsthan is Astana

In chemistry, a product is a substance that is formed as the result of a chemical reaction. In a reaction, starting materials called reactants and the ending materials are called products.

The correct pairing of DNA bases among the given options is guanine - cytosine.