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notsponge [240]
3 years ago
8

Which of the following statements does not describe the structure of an atom?  An atom has a small, dense center called the nucl

eus.  Inside the nucleus of an atom are protons and electrons.  Protons are positively charged sub-atomic particles.  Electrons are negatively charged sub-atomic particles.
Chemistry
2 answers:
Allushta [10]3 years ago
7 0
B. I am studying this right now and I know this for a fact because C, D, and A are true and protons are located inside the nucleus and electrons are located outside the nucleus which means B is your answer.
Gala2k [10]3 years ago
5 0
<span>Inside the nucleus of an atom are protons and electrons. </span>
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For which of the following elements would the most common ion be expected to have a larger radius than that of its corresponding
Andre45 [30]

<u>Answer:</u> The ion that is expected to have a larger radius than the corresponding atom is chlorine.

<u>Explanation:</u>

There are two types of ions:

  • <u>Cations:</u> They are formed when an atom looses its valence electrons. They are positive ions.
  • <u>Anions:</u> They are formed when an atom gain electrons in its outermost shell. They are negative ions.

For positive ions, the removal of electron increases the nuclear charge for an outermost electron because the outermost electrons are more strongly attracted by the nucleus. So, the effective nuclear charge increases for cations and thus, the size of the cation will be smaller than that of the corresponding atom.

For negative ions, the addition of electron decreases the nuclear charge for an outermost electron because the outermost electrons are less strongly attracted by the nucleus. So, the effective nuclear charge decreases for anions and thus, the size of the anion will be larger than that of the corresponding atom.

For the given options:

<u>Option a:</u> Chlorine

Chlorine gains 1 electron and form Cl^- ion

<u>Option b:</u> Sodium

Sodium looses 1 electron and form Na^+ ion

<u>Option c:</u> Copper

Copper looses 2 electrons and form Cu^{2+} ion

<u>Option d:</u> Strontium

Strontium looses 2 electrons and form Sr^{2+} ion

Hence, the ion that is expected to have a larger radius than the corresponding atom is chlorine.

8 0
3 years ago
Determine the temperature of 1.42 mol of a gas contained in a 3.00-L container at a pressure of 123 kPa
Rashid [163]

Answer:

The temperature is 30,92K

Explanation:

We use the formula PV=nRT. We convert the unit of pressure in kPa into atm.

101,325kPa----1atm

121kPa-------x=(121,3kPax 1 atm)/101,325kPa=1, 2 atm

PV=nRT---->T= (PV)/(RT)

T=(1,2 atm x 3L)/(1,42 mol x 0,082 l atm/K mol )= 30, 91721058 K

6 0
3 years ago
What precipitate is formed when solutions of aluminum nitrate and calcium<br> chromate are mixed?
Scrat [10]

Answer:

Aluminum chromate, a yellow precipitate.

Explanation:

{ \bf{2Al(NO _{3} ) _{3(aq)}+ 3CaCr _{} O _{4(aq)}   → { \orange{Al _{2} (CrO _{4} ) _{3(s)}} +3 Ca(NO _{3}) _{2(aq)} }}}

7 0
3 years ago
C. Write P on the line if the given object possesses potential energy and Krit
Thepotemich [5.8K]

Answer:

1 K

2 P

3 P

4 P

5 K

6 K

7 K

8 P

9P

10 K

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3 years ago
STRONGEST METALL ON EARTH
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Answer:

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