Remember, covalent compounds are compounds with bonds between two non-metals. Ionic bonds are those between a metal and a non-metal.
To determine if an element is a metal or non-metal, simply look at the periodic table! So...
a. Li is found on the left side while F is found on the right. A bond between a metal and a non-metal. This is an ionic bond.
b. Mg is found on the left side while S is found on the right. A bond between a metal and a non-metal. This is an ionic bond.
c. This is a tricky one. ammonia, or NH3, is covalent. You just have to remember this one. It has no net charge, unlike its brother NH4 (which has a 1+ charge put is still covalently bonded). Hydrogen has weird properties!
d. Ca is found of the left side while Cl is found on the right. A bond between a metal and a non-metal. This is an ionic bond. Also consider the charges! Ca has a charge of 2+ but Cl only has a charge of 1-. This is why there are 2 Cloride atoms.
What is the physical properties and the physical change ?
Answer:
1. A physical property is any property that can be observed using the five senses or can be measured without changing the matter.
2. A physical change is a change where no new substance is formed. Physical changes affect the form of a substance, but not what it's made up of
Hope this helps!!!
Happy Saturday!
Answer:
Explanation:
Simply
Coal has two valent electrons, so there is 2 in 2p orbital
Answer:
The answer to your question is below
Explanation:
See the attachment.
Synthesis ΔH
ΔH = 25 - (-30) = 25 + 30 = 55 kJ Endothermic reaction
Single reaction
ΔH = 30 - 65 = -35 KJ Exothermic reaction
Double reaction
ΔH = 60 - 10 = 50 kJ Endothermic reaction
Answer:
Explanation:
Equilibrium reactions are reversible reactions.
The general expression for equlibrium reactions is:
Which means that A produces B and B produces A. Those are two reactions:
- Direct or forward reaction: A → B (the arrow points from left to the right)
- Reverse reaction: A ← B (the arrow points from right to left).
So, in the direct reaction A is the reactant and B is the product, and in the reverse reaction A is the product and B is the reactant.
When you start with only A, only A is reacting and since the rate of reaction is proportional to the concentration of the reactants the rate of the direct reaction is high. As the reaction proceeds B appears and the concentration of A decreases, so the rate of the direct reaction decreases and the rate of the reverse reaction increases. At some moment the rate of both direct and reverse reactions are equal and the dynamic chemical equilibrium is reached.