True, Robert Hooke was the first person to discover cells inside a cork.
I₂ is the halogens which is darkest in colour than other.
<h3>What is halogen? </h3>
Halogens are the elements which belongs to group 17. Group 17 elements are known as halogens. They are highly electronegative in nature.
The last electronic configuration is ns2 np5. Since, one electron is less to get stable electronic configuration. Therefore, they accept one electron and get stable electronic configuration.
<h3>Why halogens are dark in colour? </h3>
As we move down the group, the darkness of colour increases. This is due to ionization energy which decreases as we move down the group. This is due to increase in the atomic size and decrease in nuclear form which further make high energy level to absorb lesser light and reflects deepen colour on moving down the group. Due to which they appears dark. Therefore, option A is the correct option.
Thus, we can concluded that I₂ is the halogens which is darkest in colour than other.
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<h3>
Answer:</h3>
Acceleration of the cyclist: 2.67 m/s²
The acceleration of the cyclist is lower than that of the car.
<h3>
Explanation:</h3>
- Acceleration refers to the rate of change in velocity of a body in motion.
- It is calculated by; dividing the change in velocity by time.
- Acceleration = (Final velocity - Initial velocity) ÷ time
In this case;
For the cyclist;
Initial velocity = 0 m/s
Final velocity = 8 m/s
time = 3 seconds
Therefore;
Acceleration = (8 m/s - 0 m/s) ÷ 3 seconds
= 2.67 m/s²
For the car;
- Initial velocity = 0 m/s
- Final velocity = 30 m/s
- Time = 8 seconds
Therefore;
Acceleration = ( 30 m/s - 0 m/s) ÷ 8 seconds
= 3.75 m/s²
The acceleration of the cyclist is lower than that of the car.
Answer:
The answer to your question is below
Explanation:
Ionic bonds are when a metal and a nonmetal attach to form a compound. The difference in electronegativity of these compounds is higher than 1.7.
In this kind of bond, metals lost their valence electrons to obtain stability and nonmetals gain those electrons to gain stability.
A neutralization titration is a chemical response this is used to decide the composition of an answer and what kind of acid or base is in it. This is a way of volumetric analysis and the formula is (
).
Utilize the titration method of in view that we're given the concentrations of every compound and the quantity of 
. Let: M1 = 0.138M, V1 = x, M2 = 0.205M, V2 = 26.0 ML.
- M1 = initial mass
- V1= initial volume
- M2 = final mass
- V2= final volume
- (0.138)(V1) = (0.205)x(26.0)
- V2=(0.205)x(26.0)\ 0.138
- V2 = 47.10 M/L
- The final value of Volume needed for neutralization of nitric acid solution is V2 = 47.10 M/L
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