List inconsistency of Dalton's atomic theory

Answers

Answer 1

Answer: It does not account for isotopes: As per Dalton's atomic theory, all atoms of an element have identical masses and densities. However, different isotopes of elements have different atomic masses (Example: hydrogen, deuterium, and tritium).

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When calculating total valence electrons, extra electron pairs are added to which atom?a. Central
b. Inside
c. Outside
d. Upper

Answers

When calculating total valence electrons, extra electron pairs are added to the Outside of an atom. The answer is letter C. Suppose you have a compound of CCl4. You know that chlorine can only share 1 electron because 7 of its electrons are filled. Also, in carbon, it can only share 4 electrons because 4 of it are already filled. That is why carbon needs four chlorine to form CCl4.

A period is a horizontal row on the periodic table.
a. True
b. False

Answers

It is True because in the periodic table of elements, there are seven horizontal rows of elements called periods. The vertical columns of elements are called groups, or families.

Which characteristics both generally decrease when the elements in Period 3 on the Periodic Table are considered in order from left to right?(1) nonmetallic properties and atomic radius
(2) nonmetallic properties and ionization energy
(3) metallic properties and atomic radius
(4) metallic properties and ionization energy

Answers

Answer: 3) metallic properties and atomic radius

Explanation: reference table s trust me lol

Final answer:

The metallic properties and atomic radius generally decrease when the elements in Period 3 on the Periodic Table are considered in order from left to right.

Explanation:

The correct option is (3) metallic properties and atomic radius.

As we move across Period 3 on the periodic table from left to right, the elements change from metals to nonmetals. Metallic properties generally decrease across the period because the electrons are added to the same energy level, resulting in increasing effective nuclear charge and stronger attractions between the nucleus and the valence electrons.

At the same time, the atomic radius generally decreases across the period due to the increasing effective nuclear charge, which pulls the electrons closer to the nucleus.

Learn more about Period 3, Periodic Table, metallic properties, atomic radius here:

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The chemical reaction in which compounds break up into simpler Constituents is a.

Answers

decomposition its the answer

Answer:

decomposition

Explanation:

did the test and got it correct

A balloon, whose volume at 23°C is 535 mL, is heated to 46°C. Assuming the pressure and amount of gas remain constant, what is the volume of the balloon at 46°C?

Answers

Calculate freezing temperature of.5 M sodium chloride solution. Assume that the molality of each solution is .5 Ma. -.93 Celsius
b. -1.86 Celsius
c. -3.72 Celsius
d. -.538 Celsius

Answers

Given,
Molality = .5M

We know, Kf = 1.86

Now,
Δ T = M x Kf
= 1.86 * 0.5
= 0.93 °C

Now,
Freezing point = Initial freezing point - Δ T
= 0°C - 0.93°C
= -0.93°C
So, the answer is A

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