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
Marta_Voda [28]
3 years ago
14

Who made the idea that as you go down the periodic table the atomic radius increases and the first ionization energy decreases?

Chemistry
2 answers:
bekas [8.4K]3 years ago
7 0

<u>Answer:</u>

The idea that as we go down the periodic table the atomic radius increases and first ionization energy decreases was given by Henry Moosely after he made some changes in the periodic table, the theory proposed by Mendeleev.

<u>Explanation:</u>

  • Both these trends were well explained and supported by genuine reasons.
  • As we go down a group in periodic table, a new shell is added at each level, which increases the size and hence the radius of the atom and the size of atom increases which means the outermost shell is increasingly moving farther from the atom.
  • Due to this fact, electrons experience less attractive force from the nucleus and electrons are easily removed, so the first ionization energy decreases.
Semenov [28]3 years ago
7 0
<h2>Henry Moseley made the idea that as you go down the periodic table the atomic radius increases and the first ionization energy decreases</h2>

Explanation:

Mosely revised the periodic table trend devised by Mendelev by changing the criterion of atomic mass to atomic number.

The atomic number defines the atomic radius as well as ionization energy trends in the periodic table. The atomic number or the number of positively charged protons determines the atomic radius. With increase in positive charge, the atomic radius decreases due to electron proximity towards the nucleus.

In a periodic table:

Across a period – nuclear charge increases, a greater attraction between the valence shell electron and nucleus

Down a group – nuclear charge increases, shielding increases due to more electron shells, a lesser attraction between the valence shell electron and nucleus. Based on this,

Across a period – atomic radius decreases and first ionization energy increases

Down a group – atomic radius increases and first ionization energy decreases

You might be interested in
Rank the following molecules (1st, 2nd, 3rd, 4th) in the order that they melt.
Daniel [21]

Sodium chloride has the highest melting point while iodine has the least melting point.

The melting points of solid substances depends on the nature of intermolecular forces that exists in the substance. The stronger the magnitude of intermolecular forces in a substance, the higher its melting point.

The order of melting points of the solids shown in question is as follows;

  • 1st - Sodium chloride
  • 2nd - sucrose
  • 3rd - paraffin
  • 4th - Iodine

Sodium chloride has the highest melting points because it is an ionic substance. Among the molecular sucrose and paraffin, sucrose has a higher melting point than sucrose because it has a greater molar mass. Iodine, a molecular substance has the least molar mass and the least melting point in the list.

Learn more: brainly.com/question/25777663

6 0
2 years ago
Summarize the characteristics of each type of element below
aniked [119]
What are the elements?
7 0
3 years ago
an element has a metallic gray appearance. it also has the properties of both a metal and a nonmetal. in which section of the pe
irinina [24]
If it has properties of metal and non metal it is considered a metalloid there are very few spots in which metalloids are located the spots I circled on a blank periodic tables are where the metalloids are located on an actual periodic table your only options are
boron(B) silicon(si) germanium(Ge) arsenic(As)antimony(Sb)tellurium(Te)astatine(At)those are the only places on the periodic table that has metalloids... I hope this helps

6 0
3 years ago
What would happen if I removed a resistor from a parallel circuit? What would
barxatty [35]

Answer:

In a parallel circuit, current divides through resistors and current might be different depending upon the resistor and all resistors have the same potential difference. Therefore, if a parallel resistor was removed then the total resistance of the circuit will increase.

7 0
2 years ago
What information do the coefficients of a balanced equation give about the reactants
Nana76 [90]
The information that the coefficients of a balanced equation give about the reactants are to tell how many moles of reactants are needed and how many moles of product can be produced.
4 0
3 years ago
Other questions:
  • What does temperature measure?
    15·2 answers
  • What is the environmental impact natural polymers have made?
    15·1 answer
  • Can anyone help me answer these questions, please?
    11·1 answer
  • 0.102 g of an unknown(non electrolyte) compound is dissolved in enough water to make 100. mL of a solution and has an osmotic pr
    12·1 answer
  • How I can/to answer it?
    12·1 answer
  • How do hurricanes form? How do hurricanes form?
    6·2 answers
  • At 303 K, the volume of a gas is 30.0 ml. At constant pressure, what is the new
    11·1 answer
  • Scientists claim that climate change is happening because Earth is warming. They
    15·2 answers
  • The edge of the card measures 2.5 inches, what is it in cm?
    10·1 answer
  • Consider the following equilibrium:
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!