The chemical formula of a compound express the atoms by which the molecule is formed and the ratio of the atoms in which they are combined.
The space filling model of a compound describe the electron density in the compound of each atom.
The ball and stick arrangement of a compound describe the way in which the molecules are present in three dimensions.
The structural formula state the number of atoms present in the molecule, the type of element or atom present in the molecule and the way in which they are arranged closely which is the bond.
Thus only the structural formula only will cover all the options as stated.
Answer:
c. Kay's rule
Explanation:
Kay's rule -
The rule is used to determine the pseudo reduced critical parameters of mixture , with the help of using the critical properties of the components of a given mixture .
The equation for Kay's rule is as follows ,
PV = Z RT
Where Z = The compressibility factor of the mixture .
Hence from the given options , the correct answer is Kay's rule .
The correct answer is the second option. During fusion, uranium atoms are fused together. Fusion reaction happens when two or more nuclei combine or collide to form an element with a higher atomic number. In this process, some of the matter of the fusing nuclei is converted to energy.
Number of protons n one atom of Calcium 39 is 20.
Number of protons in any element is equal to its atomic number. Since the atomic number of calcium is 20, hence, the number of protons is also 20. To balance the positive charge, the atoms contain same number of electrons. Thus, number of electrons in given atom of calcium will also be 20.
The number of neutrons is calculated by performing subtraction between mass number and number of protons. The number of neutrons is indicative of the isotope of atom, as it changes with the mass of an atom.
Calcium is an alkaline earth metal. The smallest unit of matter is atom which can occur either in neutral state or in ionized state.
Learn more about calculation of number of protons, neutrons and electrons-
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