Concrete is a composite, since it is composed of various elements like, sand, gravel & water. When mixed together with the proper measurements, it produce cement which is used for building construction, road concreting, etc.
The options attached to this question are given below:
A. Their masses are always equal.
B. Each element always contributes the same number of atoms.
C. Atoms of different elements always combine in the same way.
D. Their volumes are always equal.
ANSWER
The correct option is C.
John Dalton was an English Chemist, he was the one who proposed the statements that are called Dalton's atomic theory. The theory is made up of five main points, they include the following:
1. All matters are made up of atoms.
2. Atoms of the same elements are identical.
3. Atoms of different elements vary in size and mass.
4. Compounds are formed when elements combined in whole ratios.
5. A chemical reaction result in rearrangement of the atoms in the reactants to form products.
Dalton atomic theory has been extensively revised.
Blood Tests
A creatinine level of greater than 1.2 for women and greater than 1.4 for men may be an early sign that the kidneys are not working properly. As kidney disease progresses, the level of creatinine in the blood rises.
Whether or not there is enough space, food freshness, mobility throughout environment,ability to resemble environment, and temperature control
I’m not going back to the office