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
Gekata [30.6K]
2 years ago
8

The electron affinity of an element is positive if energy is absorbed during the process of accepting an electron and negative i

f energy is released during the process. Using the electron configuration of the atom or ion undergoing the addition of an electron, predict whether the electron affinity will be positive or negative for the following reactions, and classify them accordingly.
Na(g)+ 1e^- → Na^-(g)
Mg(g)+1e^- → Mg^-(g)
Br(g)+ 1e^- → Br^-(g)
Chemistry
1 answer:
julsineya [31]2 years ago
5 0

Answer:

See explanation

Explanation:

Electron affinity is the energy released when an extra electron is added to a neutral gaseous atom. A negative value of electron affinity indicates that energy is given out and vice versa.

Metals have positive electron affinity since electrons rarely accept electrons, so;

Na(g)+ 1e^- → Na^-(g)      positive

Mg(g)+1e^- → Mg^-(g)      positive

For the last case; Br(g)+ 1e^- → Br^-(g), the electron affinity for the non-metals is negative. hence the answer

You might be interested in
What type of bonding holds the atoms in an h2o molecule together?
Ivanshal [37]
Covalent bond  two non metals
3 0
2 years ago
Which isotope will spontaneously decay and emit particles with a charge of +2?
GenaCL600 [577]
(4) 220Fr, known as Francium-220, undergoes alpha decay, which emits an alpha particle, also known as a helium nucleus, which has a charge of +2.
8 0
3 years ago
why can you find different features at an oceanic-continental convergent zone than those found at a continental-continental conv
arlik [135]
Continental plates are much thicker that Oceanic plates. At the convergent boundaries the continental plates are pushed upward and gain thickness. The rocks and geological layers are much older on continental plates than in the oceanic plates. The Continental plates are much less dense than the Oceanic plates.
7 0
2 years ago
Food is heated up in a microwave. The heat transfer used in a microwave is
azamat
Radiation 

hope that helped!
6 0
2 years ago
Read 2 more answers
An alloy of bronze is manufactured by melting 51.2 g of copper with 6.84 g of tin. What is the percent copper in the bronze?
Harlamova29_29 [7]

Answer:

Percentage of copper = 88%

Explanation:

Given data:

Mass of copper = 51.2 g

Mass of tin = 6.84 g

Percentage of copper = ?

Solution:

Formula:

Percentage of copper = mass of copper / total mass × 100

Now we will determine the total mass:

Total mass = mass of copper + mass of  tin

Total mass = 51.2 g + 6.84 g

Total mass = 58.04 g

Now we will calculate the percentage of copper.

Percentage of copper = 51.2 g / 58.04 g × 100

Percentage of copper = 0.88 × 100

Percentage of copper = 88%

5 0
3 years ago
Other questions:
  • This is the energy that all moving objects have. 1.
    15·1 answer
  • Which statement is the best example of pseudoscience? (1 point) Scientists have observed many constellations in our universe. Mo
    6·2 answers
  • Please help me!!!!!!!!
    10·1 answer
  • What is the difference between synthesis, decomposition and combustion?
    9·1 answer
  • What happens if a cell cannot do cellular respiration?
    14·1 answer
  • A mass of 2.20 g carbon monoxide is reacted with 4.86 g hydrogen to form methanol.CO(g) + 2 H2(g) → CH3OH(g)The reaction is perf
    11·1 answer
  • 1) A) Balance the following equation:
    15·1 answer
  • A scientist mixes a solid powder into a beaker
    15·1 answer
  • If crystal growth does not start on its own after the solution in the flask returns to room temperature, identify the best ways
    7·1 answer
  • 6. What do we call Ethene that has been polymerised?​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!