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
Margaret [11]
2 years ago
13

In each of the given pairs, choose which element will have the bigger atom. Give reasons for your choice. (a) Mg (atomic number

12) or Cl (atomic number 17) (b) Na (atomic number 11) or K (atomic number 19)
Physics
1 answer:
Dafna1 [17]2 years ago
3 0

Answer:

Mg (atomic number 12)

K (atomic number 19)

Explanation:

The size of an atom is estimated in terms of its atomic radius.

The atomic radius is taken as half of the inter-nuclear distance between two covalently bonded atoms of non-metallic elements or half of the distance (d) between two nuclei in the solid - state of metals.

  • Across a period, atomic radii decrease progressively from left to right.
  • This is due to the progressive increase in the nuclear charge without increase in the number of electronic shells.
  • Down a group, atomic radii increase progressively due to the successive shells of electrons being added which have been compensated for by the increase in nuclear charge.

Cl is further right of Mg in the third period

K is below Na in the first group

You might be interested in
Suppose the half-life of an element is 10 years. How many half-lives will it take before only about 6% of the original sample re
sergiy2304 [10]
You don't need to worry about the 10 year bit with this question. Just grab a calculator and divide 100/2, then the answer to that (50) by 2 etc and keep dividing by 2 until you get down to 6.25.

The answer ends up being 4 half lives :)

If you don't understand what a half life is please let me know :)
4 0
3 years ago
Read 2 more answers
I need help with this answer
7nadin3 [17]

Answer:

double replacement

Explanation:

sorry if im wrong

8 0
3 years ago
The making of the mind is a powerful place and what you feed it can affect you in a powerful way ^^
sleet_krkn [62]

Answer:

yea that is very true ◠﹏◠✿

Explanation:

3 0
2 years ago
Please help!!!!!!!! 25 points
Archy [21]

Answer:

B: beaks, finches.

Explanation:

Beaks, finches. This is because he noticed that fruit-eating finches had beaks similar to parrots, while finches that ate insects had narrow beaks. The difference in their beaks is due to adapting to different environments which causes them to evolve into different species of finches.

7 0
3 years ago
Read 2 more answers
A 34.9-kg child starting from rest slides down a water slide with a vertical height of 16.0 m. (Neglect friction.)
aalyn [17]

Answer:

a) 12.528 m/s

b) 15.344 m/s

Explanation:

Given:

Mass of the child, m = 34.9 kg

Height of the water slide, h = 16.0 m

Now,

a) By the conservation of energy,

loss in potential energy = gain in kinetic energy

mgh = \frac{\textup{1}}{\textup{2}}\textup{m}\times\textup{v}^2

where,

g is the acceleration due to the gravity

v is the velocity of the child

thus,

at halfway down, h = \frac{\textup{16}}{\textup{2}}= 8 m

therefore,

34.9 × 9.81 × 8 = \frac{\textup{1}}{\textup{2}}\textup{34.9}\times\textup{v}^2

or

v = 12.528 m/s

b)

at three-fourth way down

height = \frac{\textup{3}}{\textup{4}}\times16 = 12 m

thus,

loss in potential energy = gain in kinetic energy

34.9 × 9.81 × 12 = \frac{\textup{1}}{\textup{2}}\textup{34.9}\times\textup{v}^2

or

v = 15.344 m/s

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which two energy sources can help a star maintain its internal thermal pressure? which two energy sources can help a star mainta
    7·2 answers
  • A child is holding a cup of hot tea. His mother, a physicist, warns him not to start running with the tea. According to Newton's
    7·1 answer
  • When does the fall equinox occur in the northern hemisphere
    13·1 answer
  • How does the force of gravity between two bodies change when the distance between them doubles? 1. unable to determine; the mass
    11·1 answer
  • Biologists think that some spiders "tune" strands of their web to give enhanced response at frequencies corresponding to those a
    6·1 answer
  • A fly is call inside a car that is moving in the positive direction with constant velocity. The fly flies with a constant veloci
    15·1 answer
  • All of the planets and their satellites orbit the Sun in the same direction, and all their orbits lie near the same plane. True
    11·1 answer
  • A box is sliding along a frictionless surface and gets to a ramp. Disregarding friction, how fast should the box be going on the
    12·1 answer
  • What is the magnitude of the displacement?
    11·1 answer
  • Which scientist described an atom made of a solid positively charged substance with electrons dispersed throughout it?.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!