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
11111nata11111 [884]
3 years ago
5

What’s the answer please

Chemistry
1 answer:
bogdanovich [222]3 years ago
5 0

Answer:

B and C

Explanation:

You might be interested in
Now select a longer period, say the fourth period, starting with the element in the 1A group. Again, go from left to right. What
Inessa [10]

Answer:

The pattern of change in the electron configuration increases from left to right across the period.

Explanation:

In the periodic table, elements having the same number of electrons in the outermost shell of their atoms are placed over one another in vertical columns. Each of the vertical columns is known as a group or family. while each of the resulting horizontal rows is known as a period or row.

There are 18 vertical columns and seven periods in the periodic table. Each period begins with an atom having a valence electron and ends with an atom having a complete outer shell structure of an inert gas.

The fourth period of the periodic table (d-block) consists of the transition elements.

The electron distribution into the energy levels of sublevels of atoms  can be shown in any of the tree important electronic configuration.

Electronic configuration shows the sequence of filling electrons into the orbitals of the sublevels as guided by some principles.

The maximum number of electrons in the orbitals of sublevels are two for s-sublevel(one orbital) ; six for p-sublevel( three orbital); ten for d-sublevel ( five orbitals) and fourteen for f-sublevel( seven orbitals). This indicates that the maximum number of electrons in an orbital is two

In the Periodic table ,The sublevels with lower energies are filled  up before those with higher energies. One important thing about this principle is that the sublevels do not fill up in numerical order. The pattern of filling is as follows:

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f etc.

5 0
3 years ago
25 POINTS TO WHOEVER CAN FILL THIS OUT! Radioactivity Decay
Degger [83]

Answer:

how long?

Explanation:

3 0
3 years ago
I NEED ANSWER PLEEEAASSEE!!!
emmasim [6.3K]
The answer is B. This is because Sodium has 1 valence electron and Fluorine has 7 valence electrons. All elements want 8 valence electrons so they may be stale, like the noble gases are. Hope this helps.
3 0
4 years ago
Read 2 more answers
The yttrium- nuclide radioactively decays by electron capture. Write a balanced nuclear chemical equation that describes this pr
evablogger [386]

Answer:

See explanation and image attached

Explanation:

Yttrium has many isotopes, the lowest mass number of Yttrium  is 89Y.

Recall that electron capture converts an electron into a proton and then into a neutron with a consequent emission of a neutrino (v).

In electron capture, the mass number of the daughter nucleus remains the same as that of the parent nucleus while the atomic number of the daughter nucleus is less than that of the parent by one unit.

8 0
3 years ago
How many mm are in 3.6 km?
Rainbow [258]

Answer:

3.6km = 3.6e+6mm

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Horsetail are helpful for treating
    15·1 answer
  • 6. How do the two main classifications of energy resources differ?
    11·1 answer
  • Why air is blended in ice cream
    11·1 answer
  • Carbon tetrachloride, CCl4, once used as a cleaning fluid and as a fire extinguisher, is produced by heating methane and chlorin
    5·1 answer
  • Determine the value of the equilibrium constant, Kgoal, for the reaction CO2(g)⇌C(s)+O2(g), Kgoal=? by making use of the followi
    11·1 answer
  • What is the criteria to place an element in a particular group?
    10·1 answer
  • How many liters of a 3.67 M K2SO4 solution are needed to provide 57.3 g of K2SO4(molar mass 174.01 g/mol)? Recall that M is equi
    15·1 answer
  • Which of the following statements about electric charges and magnetic domain is true?
    13·2 answers
  • Which of the following is an ionic compound?
    6·2 answers
  • Hi;) this is easy i just need someone to explain it to me
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!