Answer:
80 grams
Explanation:
number of moles=mass/molar mass .
5=x/16, x=16*5
x=80 grams
The plum pudding model of the
atom by the scientist Sir Joseph John Thompson or J.J. Thompson. It was
theorized after the discovery that electrons are present in the atom. In this
model, the atom is composed mainly of electrons. It was describe as plum
pudding because the electrons are dispersed within the atom. John Dalton
discovered the atom. Ernest Rutherford discovered the half – life of an atom
and Neils Bohr explain the quantum mechanics. So the answer is J.J. Thompson.
Answer:
Explanation:
fluorine have gained one electron that is why the sign is -1. they both have different number of protons. They have different neutron numbers. F have 10 and O have 8.
hope this helps :)
Explanation:
It is known that ionic compounds are the compounds formed by transfer of electrons from one atom to another. Ionic compounds have high boiling point because their combining atoms contain opposite charges due to which strong forces of interaction exists between them.
A metallic bond is formed due to mobile valence electrons shared by positive nuclei in a metallic crystal.
When a bond is formed by sharing of electrons between the combining atoms then the compound formed is known as covalent compound. In these compounds there exists weak forces due to sharing of electrons and therefore, they have low boiling point.
Hydrogen bonding is defined as a bonding which exists between a hydrogen atom and an electronegative atom like O, N and F.
Therefore, out of the given options KI is an ionic compound and it will have high boiling point due to the presence of strong interactive forces between hydrogen and fluoride ions. being a covalent compound has low boiling point.
The compound HF has hydrogen bonding and its boiling point is around . Whereas HI has low boiling point due to the large difference in the size of H and I. Magnesium being a metallic solid will have boiling point more that a covalent compound but less than an ionic compound.
Thus, we can conclude that given species are arranged from highest boiling point (top) to lowest boiling point (bottom) as follows.
KI > Mg > > HF > HI
Answer:
Density is a measure of how heavy something is compared to its size. If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float.
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