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wlad13 [49]
3 years ago
5

Which of the following is the most recent addition to the accepted model of the atom? (2 points) Atoms are indivisible particles

. Protons are located in the nucleus. Electrons form a cloud around the nucleus. Neutrons orbit the nucleus along circular paths.
Chemistry
2 answers:
Natalija [7]3 years ago
7 0
The correct answer is "Electrons form a cloud around the nucleus" 

I just took the test
Georgia [21]3 years ago
5 0
The accepted model of an atom was made by Schrodinger, which is known as the quantum mechanical model. Unlike Bohr's model, electrons are represented as a cloud and not small balls orbiting the nucleus. There is no define path of electrons in Schrodinger's model, but it can predict the odds of where an electron is located. 

The answer to your question is then Electrons form a cloud around the nucleus.
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The following equation IS balanced: HNO3+ NaHSo3-NaNO3+ H2o (T/F)
Ket [755]

Answer : The given equation are not balanced equation.

Explanation :

Balanced chemical equation : It is defined as the number of atoms of individual elements present on the reactant side must be equal to the number of atoms of individual elements present on the product side.

The given chemical reaction is,

HNO_3+NaHSO_3\rightarrow NaNO_3+H_2O

This chemical reaction is an unbalanced reaction because in this reaction, the number of atoms of oxygen are not balanced and the molecule SO_2 are missing on the product side.

So, in order to balanced the chemical reaction, the molecule SO_2 are added on the product side.

Thus, the balanced chemical reaction will be,

HNO_3+NaHSO_3\rightarrow NaNO_3+H_2O_SO_2

5 0
3 years ago
A student wants to classify some household chemicals by testing them using litmus paper. If she is going to classify these chemi
Murrr4er [49]

Answer:

its A

Explanation:

becasue when blue litmus paper turns red the substance has a pH level below 7,and when it stays blue it is above 7.

7 0
3 years ago
Which of the following shows 3x + 15 + 6x – 7 + y in simplest terms?
prisoha [69]

Answer:

9x+y+8

Explanation:

We know this because you add 3x and 6x to get 9x

then we only have one y so put y by itself then subtract 15 and y which gets us 8

3 0
3 years ago
Why is it important to determine the qcalorimeter before determining the qmetal?
nataly862011 [7]
<span>To find the enthalpy change per mole of a substance A in a reaction between two substances A and B, the substances are added to a calorimeter and the initial and final temperatures (before the reaction started and after it has finished) are noted</span>
7 0
3 years ago
Read 2 more answers
In a sample containing 100 atoms of X, 70 were found to be 9X while 30 were 11X isotopes. Determine the average relative atomic
Burka [1]

The average relative atomic mass of a sample containing 100 atoms of X, 70 were found to be 9X while 30 were 11X isotopes is 9.6g.

<h3>What is Atomic mass? </h3>

Atomic mass is defined as the whole mass of an atom.

It is also defined as the sum of atomic number and number of neutrons.

Atomic mass = Atomic number + neutrons

<h3>What is Isotopes?</h3>

Isotopes are the those element which have same atomic number but have different mass number and number of neutrons.

The average relative atomic mass can be calculated as

mass of isotopes/ mass of sample

mass of all isotopes = (70 × 9X) + (30 × 11X)

=(630 + 330) X

= 960X

Average relative atomic mass = 960X/ 100 X

= 9.6 g

Thus, we concluded that the average relative atomic mass of a sample containing 100 atoms of X, 70 were found to be 9X while 30 were 11X isotopes is 9.6g.

learn more about atomic mass:

brainly.com/question/14250653

#SPJ9

5 0
2 years ago
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