CHEMISTRY HIGH SCHOOL

In 1803, the British chemist John Dalton proposed several atomic theories. Which one of his theories was later shown to be incorrect?I. Atoms are indivisible and indestructible particles.

II. All atoms of the same element are exactly alike.

III. Atoms of different elements are different.

IV. Atoms combine in specific numerical ratios to form compounds.

A. II only
B. II & III only
C. I & II only

Answers

Answer 1
Answer: Option C: I and II only.

The atoms have subparticles and the isotops are atoms of the same element that differ in the number of neutrons.

Related Questions

In a laboratory experiment, John uses a mesh to separate soil particles from water. Which technique of separation is he using?
1) Look at the graph. What is the independent variable and the dependent variable?
When [OH-] changes from 10-9 to 10-11 in a solution: Kw = [H+][OH-] What is the [H+] after the change?
All of the questions
Which type of bond is found between atoms of solid cobalt?(1) nonpolar covalent (2) polar covalent (3) metallic (4) Ionic

Find the mistake
Cu(NO3)2(s) + CuO(s) → 2NO(g) + O3(g)

Answers


there are 2 copper atoms on the left side of the arrow, but none on the other side. there are also 7 oxygen atoms on the left hand side, but only 5 on the right hand side of the arrow.

The main difference between heat and temperature is the temperature is solely dependent on what

Answers

Heat is the total energy of molecular motion in a substance while temperature is a measure of the average energy of molecular motion in a substance. 

Hope this helped :)

Choose the statement that best describes the titration from which this data was collected

Answers

I think the correct answer is the first option. The analyte was an acid but and the titrant is a base since from the graph the initial pH of the solution is at an acidic pH when  there is still no titrant added.

Which of the isotopes is the most abundant isotope in the sample?Cd-106
Cd-108
Cd-112
Cd-114
Cd-116

Answers

Answer: Cd-112

Explanation: to find out the most abundant isotope, look at the weighted average on the periodic table. the one closest to it in mass is going to be the most abundant isotope. in this case, the weighted average of cadmium is 112.411, so the answer is Cd-112.

The sequence in which energy sublevels are filled is specified by

Answers

Answer: Aufbau principle

Explanation: Aufbau principle explains that electrons are fed into orbitals starting at the lowest energy level before filling higher energy levels.

What is Nuclear Fission?

Answers

It's where a heavy nucleus splits on its own or upon impact. This will release energy and used in things like bombs, powerplants, etc
the main process of generating nuclear energy
Other Questions
what is the volume of a gas at 2.00 atm and 200.0 K if its original volume was 300.0 L at 0.250 atm and 400.0 K
Hydrocarbons contain only hydrogen and carbon. True False
What is the correct electron configuration for Si (atomic number 14)?A. 1s2 2s2 2p6 3s2 3p2 B. 1s2 2s2 2p6 3s2 3p3 C. 1s2 2s2 2p6 3s1 3p3 D. 1s2 2s2 2p6 3s2 2d3
In a chemical reaction, substance R reacts with compound XY to produce 47.0 g of compound RX. If the theoretical yield of RX is 56.0 g, what is its percent yield?