CHEMISTRY HIGH SCHOOL

Why didn't scientists know about atoms for a long time

Answers

Answer 1
Answer: they didnt have a powerfull enough microscope to see them an when they could they were moving to fast unless they were cold

Related Questions

Which represents the copernican model that is the most similar to that of Aristarchus?
Solutions of lead(II) nitrate and potassium iodide were combined in a test tube.Write a net ionic equation for the reaction between lead(II) nitrate andpotassium iodide.
A gas Syringe contains 42.3 milliliters of a gas at 98.15°C. Determine the volume that the gas will occupy if the temperature is decreased to -18.50°C.
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What is the molarity of a solution that contains 5.0 moles of solute in 2.0 liters of solution? 1.0 M 2.5 M 1.5 M 0.4 M

A chemical with a bitter taste is most likely a(n) _____ a. salt.
b. solvent.
c. acid.
d. base.

Answers

(D)Base has a bitter taste

How many fluorine atoms bond with calcium to form calcium fluoride?

Answers

Answer;

2 fluorine atoms

Explanation;

  • Calcium, a Group 2 metal, commonly forms a calcium ion (Ca2+). On the other hand, fluorine, a Group 7 non-metal, commonly forms a fluoride ion (F-). The necessity of electrical neutrality ensures that 2  Fluoride ions (F-) binds to one Ca2+
  • The charge on calcium is 2+ and the charge on fluoride ions is 1-. It therefore requires 2 fluoride ions to make the compound electrically neutral.
2 charge on calcium is 2+ and the charge on fluorideions is 1-. It therefore requires 2 fluoride ions to make the compound ..

Which formula represents a molecule with the most polar bond?a. CO
b. NO
c.HI
d.HCI

Answers

D) HCl is the most polar bond. This is because the electronegativity difference between these 2 elements in this molecule is larger than the other 3 molecules given. The bigger the electronegativity difference, the more polar the bond.

Answer:

HCL

Explanation:

Reference Table S lists the electronegativity of each element. The greater the difference in electronegativity, the more polar the bond. The electronegativity of H is 2.2 and the electronegativity of Cl is 3.2; the difference is the greatest of the choices listed.

from castle learning

A mixture of sand and table salt can be separated by filtration because the substances in the mixture differ in( I) boiling point (2) density at STP(3) freezing point (4) solubility in water

Answers

A mixture of sand and table salt can be separated by filtration because the substances in the mixture differ in solubility in water. Thus, the correct option for this question is D.

What is meant by Solubility?

Solubility may be defined as the phenomenon in chemistry that involves the maximum amount of a substance that will significantly be disbanded in a given amount of solvent at a particular temperature.

The answer to the above question is better understood by the fact that when you mix both salt and sand in the water, you may find that salt is completely soluble in water while sand is not. This is because the bond of water is not competent enough to dissolve the sand.

Therefore, the correct option for this question is D.

To learn more about Solubility, refer to the link:

brainly.com/question/23946616

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The answer is (4) solubility in water. When you put the mixture into water, the salt will dissolve and sand will not. The you can separated them by filtration will solution can pass through and sand will be left.

All elements have a unique atomic emission spectrum. In which of the following scenarios would this fact be most useful?A. when trying to determine a star's chemical composition
B. when trying to determine how old an artifact is
C. when trying to measure the speed of sound

Answers

Optrion A: when trying to determine a star's chemical composition.

Because unique atomic emission spectrum, analyzing the  emission spectrum you can tell the chemical composition.

What happens to energy during the formation of a solution?

Answers

The study of chemicals and bonds is called chemistry.

The correct answer is absorbed or released.

What is energy?

  • Energy is defined as the physical property which can be transferred from one body to another.
  • There are various types of energy present. A few examples are as follows:-
  • Heat energy, wind energy, light energy, etc.

Depending on the requirement of the solution, the compound can release energy to make a bond or can release energy to break the bond from the surrounding.

Hence, the correct answer is absorbed or released.

For more information about the energy, refer to the link:-

brainly.com/question/1932868
As the solute dissolves in the solvent,energy is absorbed and used to separate and break apart molecules. Once a solution is formed, this energyis released, increasing the temperature of the solution. ... The solution is saturated if it contains just enough of the solute that the solvent can hold.
Other Questions
Jams, jellies, preserves, honey, and other food with high sugar content hardly ever become contaminated by bacteria, even when the food containers are left open at room temperature. This is because bacteria that encounter such an environment ___________.
Both Democritus and Dalton suggested that matter is made up of atoms
1. How did Dmitri Mendeleev deal with elements that had not yet been discovered?A. He left blanks for them in his periodic table, as he predicted they would be discovered. B. He gave them names and properties and placed them in the table. C. He created them in his laboratory and placed them in the table. D. He ignored them, placing them in the table and shifting others when they were discovered. 2. Which of the following elements have properties similar to those of astatine (At)? A. F, Br, I B. Ar, S, P C. F, Ar, Ne D. Na, Mg, Al 3.What is true of the ionic size of the elements in a group as one moves from top to bottom in that group? A. Ionic size stays the same within the group. B. Ionic size does not vary in any predictable way within the group. C. Ionic size decreases from top to bottom within the group. D. Ionic size increases from top to bottom within the group.
What two types of compounds is water especially good at dissolving?