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dlinn [17]
2 years ago
11

Which is a component of John Dalton’s atomic theory? The ratio of atoms in a compound is fixed. The atoms of different elements

are the same. An atom is a small particle of matter that can be broken down. A reaction can create or destroy atoms as well as rearrange them
Chemistry
2 answers:
leonid [27]2 years ago
6 0

Answer:

The right answer is A

Explanation:

marin [14]2 years ago
5 0
The English scientist John Dalton were one of the early scientists who paved the way to science, particularly in atomic chemistry. His atomic theory jumpstarted further developments made by J.J Thomson, Rutherford, Bohr, Schrodinger and many more. 

Dalton's atomic theory can be summarized in 5 key points:

1. Atoms are tiny, indivisible and indestructible particles of an element.
2. Atoms of different elements vary in size and mass.
3. Atoms of an element are uniform in size and mass.
4. Compounds are formulated by a fixed ratio of individual atoms of elements.
5. Reactions undergo by rearranging the atoms of the reactants to form the products.

From the choices, the acceptable answer would be: <span>The ratio of atoms in a compound is fixed. </span>
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Compare properties of covalent compounds and ionic compounds. Which of the following properties differ because of differences in
____ [38]

Answer:

The answer to your question is below

Explanation:

                                ionic compounds                  covalent compounds

1.- Mass                          it does not depend on the type of compound

2.- Conductivity      -conduct electricity               - do not conduct electricity

                                  in solution.

3.- Color                  - Shiny                                     - opaque

4.- Melting point     - high                                       - lower than ionic compounds

5.- Boiling point     - high                                        - lower than ionic compounds

6.- flammability      - not flammable                       - flammable

6 0
2 years ago
Read 2 more answers
Quinine, an antimalarial drug, is 8.63% nitrogen. There are two nitrogen atoms per molecule. What is the molecular weight of qui
Furkat [3]

Answer:

324.18 g/mol

Explanation:

Let the molecular mass of the antimalarial drug, Quinine is x g/mol

According to question,

Nitrogen present in the drug is 8.63% of x

So, mass of nitrogen = \frac {8.63}{100}\times x

Also, according to the question,

2 atoms are present in 1 molecule of the drug.

Mass of nitrogen = 14.01 amu = 14.01 g/mol (grams for 1 mole)

So, mass of nitrogen = 14.01×2 = 28.02

These 2 must be equal so,

\frac {8.63}{100}\times x=28.02

solving for x, we get:

<u>x = 324.18 g/mol</u>

6 0
2 years ago
Which statement accurately compares ionic and covalent bonding?
Travka [436]

Answer:

Conduct electricity when they are molten, while covalent compounds usually do not conduct electricity when they are molten.

5 0
2 years ago
Read 2 more answers
The highest principal enegy level of period 2 elements is 2. Period 3 elements all have six 3p electrons. Period 4 elements have
Dmitrij [34]

Explanation:

The highest principal energy level of period 2 elements is 2. (True)

The highest principle energy level of elements of any period is equal to period number. So the given statement is true.

Period 3 elements all have six 3p electrons – (False)  

For example, sodium and sulfur are period 3 elements but do not contain six 3p electrons. Only Argon of period possesses six p-electrons.

Period 4 elements have an inner electron configuration of [Ar]- (True)

Atomic number of elements belonging to period 4 have atomic number more than 18 (atomic number of Ar). So they must have an inner electron configuration of [Ar]

The valence electrons of group 5A elements are in the 6s subshell – [FALSE]

Elements of group 5A are nitrogen, arsenic, antimony and bismuth. They are p-block elements. Therefore, valence electrons are present in p-subshell.

Group 8A elements have full outer principal s and p subshells –(True)  

Group 8A elements are also known as noble gas element. Octets of noble gases are complete and hence, have full outer principal s and p subshells.

The valence electrons of group 2A elements are in an s subshell – (True)

Elements of group 2A are barium, magnesium, calcium, etc. They belong to s-block elements. Therefore, their valence electrons will be in s-subshell.

The highest principal energy level of period 3 elements is 4 – (False)

The highest principle energy level of elements of any period is equal to period number.

For example, sodium is present in 3rd period, so its principle quantum number will be 3.

Period 5 elements have an inner electron configuration of [Xe] – (False)

Period 5 elements have an inner electron configuration of [Kr]. The first member of this period is rubidium. 37 and that of Kr is 36.  

6 0
2 years ago
The three aspects of the measuring process are units, systems, and instruments.
lawyer [7]

Answer:

the answer for that is false

4 0
1 year ago
Read 2 more answers
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