1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
DENIUS [597]
3 years ago
5

What is the general trend for electron affinity values going across a period? The

Chemistry
2 answers:
KIM [24]3 years ago
8 0

Answer:

a.the values become more negative

Explanation:

k0ka [10]3 years ago
5 0

Answer: The values become more negative

Explanation: I just took the quiz and got it correct :)

You might be interested in
An aqueous solution of blue copper(II) ions can react with chloride ions to form a yellow copper compound. The ionic equation fo
klio [65]
Since the forward reaction is endothermic (heat is consumed in the reaction) that means that the enthalpy change for the forward reaction is a positive value.
Therefore, i would say that the reverse or backward reaction is exothermic (heat is released in the reaction to the sorroundings) and that the enthalpy change is a negative value.
5 0
3 years ago
3. Determine the Zeff value of Uranium, also indicate (based on your answer with mathematical calculations) which electron will
Ilya [14]

Explanation:

Electronic configuration of uranium is given below -

1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰5s²5p⁶4f¹⁴5d¹⁰6s²6p⁶5f³6d¹7s2²

Effective nuclear charge (Z eff) = Atomic number (Z) - Shielding constant (S)

<u> Value of Shielding constant (S) can be calculated by using slater's rule : </u>

S = 1 (0.35) + 9 (0.85) + 81 (1.00)

S = 0.35 + 7.65 + 81.00

S = 89

So,

Zeff = Z - S

Zeff = 92 - 89

<u> Zeff = 3 </u>

Hence, Effective nuclear charge (Zeff) of uranium = <u>3 </u>

5s electron is closest to the nucleus.

3 0
3 years ago
How many moles are in 89 liters of water vapor?
Brut [27]

Answer:

4 moles

Explanation:

A mole is equal to 6.02214076 × 1023 of any chemical unit (atoms, molecules, ions)

To find number of moles in 89 litres of water vapor use the following formula:

1 mole = 22.4 L

That is 1 L = \frac{1}{24} mole

Volume of water vapor = 89 litres

Therefore,

Number of moles in 89 litres = \frac{89}{24}=3.7 ≈ 4 moles

5 0
3 years ago
The [OH-] of an aqueous solution is 3.5 x 10-5. What is the [H+]?
Sergeeva-Olga [200]

Answer: The concentration of hydrogen ion in the given solution is 2.81 \times 10^{-10}.

Explanation:

pOH of a solution is the negative logarithm of concentration of hydroxide ions.

Hence, if [OH^{-}] is 3.5 \times 10^{-5} then its pOH value is calculated as follows.

pOH = -log [OH^{-}]\\= -log (3.5 \times 10^{-5})\\= 4.45

Now, the relation between pH and pOH is as follows.

pH + pOH = 14

pH + 4.45 = 14

pH = 14 - 4.45

= 9.55

And, pH is the negative logarithm of concentration of hydrogen ions. Hence, [H^{+}] is calculated as follows.

pH = -log [H^{+}]\\9.55 = -log [H^{+}]\\H^{+} = 2.81 \times 10^{-10}

Thus, we can conclude that the concentration of hydrogen ion in the given solution is 2.81 \times 10^{-10}.

4 0
3 years ago
How does an atom become a positively charged ion? by gaining one or more electrons by gaining one or more neutrons by losing one
erma4kov [3.2K]
By losing one or more electrons
4 0
3 years ago
Other questions:
  • Identify the element whose highest energy electron would have the following four quantum numbers?
    6·1 answer
  • 100 POINTS!!!!
    6·2 answers
  • Which of the following do you expect to have soil with the highest fertility
    7·1 answer
  • The electrons in the outermost energy level of an atom that influence how an element will react with other substances
    8·1 answer
  • Which isotope will spontaneously decay and emit particles with a charge of +2?
    5·1 answer
  • 6) Which of these elements is a metal?<br> E) C<br> D) N<br> A) O<br> C) Ne<br> B) Ca
    11·2 answers
  • Identify the element that has 6 valence electrons and 3 energy levels
    14·1 answer
  • Draw structural formula of a cyclic secondary alcohol with the molecular formula c3h6o.
    5·1 answer
  • What is buffer solution?
    12·1 answer
  • Question 11. Identify the reducing agent <br> Sn+2 + AG 0 —&gt; Sn0 + Ag+
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!