The grains of sedimentary rock a. are cemented together c. are often displayed in more than one size b. form an interlocking texture d. are usually large

The grains of sedimentary rock are cemented together and form an interlocking texture.

Explanation:

The sedimentary rocks are formed by deposition of minerals from the ocean or sea waters lashed to the land shore. The deposition of minerals for a long time followed by cementation of them by the grains lead to the formation of sedimentary rocks.

The grains of the sedimentary rocks are very small in size and they are cemented together. The grains are present in the matrix of cement while the pores of the matrix are filled with grains of minerals like an interlocking texture.

convalent bond :

is a chemical bond formed by the sharing of electron between 2 atoms.

it is the direct chemical bond between 2 atoms.

in bond formation atoms are involved here.

electrovalent bond:

is a chemical bond defined as electroststic attraction between 2 atoms.

it is the electrostatic attraction between 2 atoms.

in bond formation, ions are involved here.

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and ur welcm

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it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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