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
3241004551 [841]
3 years ago
10

How many electrons are in an electrically neutral atom of boron? A) 3 B) 5 C) 6 D) 8

Physics
2 answers:
Hoochie [10]3 years ago
8 0
B. five electrons

If you want an explanation, here it is.

The atomic number gives the number of protons. Protons which have a positive charge are balanced by an equal number of electrons in a neutral atom. Boron number 5 has five protons and therefore as a neutral atom also has five electrons.
Fed [463]3 years ago
8 0

Answer:

B. five electrons

Explanation:

You might be interested in
Consider the following list of numbers. 129, 685, 125, 511, 601, 52, 46 The height of a binary search tree is the maximum number
NemiM [27]

Answer:

The height of the tree is three (3) deep

Explanation:

It's 3 deep

Under 129, comes 125 and 685;

Under 125, comes 52 : Under 685, comes 511;

Under 52, comes 46 : Under 511, is 601.

This is illustrated below.

129

∧

125,685

|,|

52,511

|,|

46,601

5 0
3 years ago
What is the definition of electrical power?
Nonamiya [84]
An electric power measure the rate of electrical energy transfer by an electric circuit per unit of time.
6 0
2 years ago
Give two examples of contact and non-contact forces and explain why they are contact and non-contact forces respectively.​
Sever21 [200]

The Two examples of contact forces are:

  • frictional force
  • Contact force.

The two examples of non contact forces are:

  • Gravitational force
  • magnetic force.

Contact forces happens due to the contact between two objects

Non Contact forces happens because there is no contact between two objects. There is no attraction.

3 0
3 years ago
A cheetah runs 900 meters in 30 seconds. how fast is it going?
Serga [27]
900 meters/30 seconds= 30 meters/second


7 0
3 years ago
LINK THE WORDS TO THE UNDERLINE. The 4 most common _____________ are solids, liquids, gases and plasmas. The _______________ are
Savatey [412]

The 4 most common <u>States of matter </u>are solids, liquids, gases and plasmas. The <u>States of matter</u> are also called the phases of matter.  

2. For a given pure substance, the amount of thermal <u>energy</u> is what separates the different states of matter. The solid state has the least thermal <u>energy</u>. The liquid state has more thermal <u>energy</u> than the solid state. The gaseous state has more thermal <u>energy</u> than the liquid state. And the plasma state has the highest thermal <u>energy</u> of the 4 states of matter.  

3. Changing from one state of matter to another is called a <u>phase change</u>. Solids can <u>phase change</u> to liquids or gasses. Liquids can <u>phase change</u> to solids or gasses. Gasses can <u>phase change</u> to liquids or solids.  

4. Frost forms from water vapor depositing as ice crystal without first becoming liquid water. This is called <u>Deposition</u>. <u>Deposition</u> is also used in industry to put a thin layer of aluminum on mylar for helium balloons and for potato chip bags.  

5. Put wet laundry outside on a clothes line in freezing weather and it will dry. The process is called <u>Sublimation</u> and a solid phase changes to a gas without first melting into a liquid. Dry ice (frozen CO2) undergoes <u>Sublimation</u> and becomes CO2 gas. It skips the liquid state and because we see something that looks like normal ice disappear without making a puddle, we call it dry ice.  

6. <u>Vaporization</u> is when a liquid becomes a gas. It can happen slowly at cool temperatures and this is called evaporation. Or it can happen faster at the boiling temperature of the liquid and this is called boiling.  

7. In the summer time, I love a glass filled with ice water. But water vapor in the air undergoes <u>Condensation</u> and becomes liquid water on the outside of the glass. Fog and clouds are also formed by <u>Condensation</u> of atmospheric water (water vapor) condensing into liquid water drops.  

8. Thermic refers to thermal energy, usually perceived as heat or temperature. Endo refers to “inside.” <u>Endothermic</u> means heat is moving INTO a process and is stored in the products of that process. Heating up liquid water is <u>Endothermic</u> because heat is being put into the process of raising the water temperature and is stored in the kinetic motion of the water molecules. Melting ice into liquid water is <u>Endothermic</u> because heat is being used to break most of the attractive bonds between water molecules so that the molecules are still close to each other, but can slide around each other.  

9. Thermic refers to thermal energy, usually perceived as heat or temperature. Exo refers to “outside” like exiting a room to the outside. <u>Exothermic</u> means heat moving out of a process. The heat energy comes from energy stored as kinetic motion of the molecules and broken bonds of attraction. When liquid water cools down, heat comes out of the water and goes to the environment around the water. This is <u>Exothermic</u>. Liquid water undergoing the phase change to become solid water (ice) is <u>Exothermic</u>. The thermal energy absorbed to “melt” the ice is released as the ice freezes.  

10. The <u>Kinetic Theory of Matter</u> theorizes that all matter is made of tiny particles (atoms and molecules) that are in constant motion. The amount of motion is an indication of the temperature. At absolute zero, all kinetic motion stops.  

7 0
3 years ago
Read 2 more answers
Other questions:
  • A speedboat travels from the dock to the first buoy, a distance of 20 meters, in 18 seconds. It began the trip at a speed of o m
    12·2 answers
  • How much energy becomes unavailable for work in an isothermal process at 440 k, if the entropy increase is 25 j/k?
    14·1 answer
  • Different forces were applied to five balls, and each force was applied for the same amount of time. The data is in the table.
    14·2 answers
  • Why is it good practice for scientists to repeat trails
    15·1 answer
  • 20 POINTS!! What does this picture look like ???
    8·1 answer
  • Which evidence would confirm that a given rock later is newer than the layers around it. 1. It has been crumpled in folded, whil
    9·1 answer
  • V=vi+at^2 dimensional correct
    10·1 answer
  • A jogger hears a car alarm and decides to investigate. While running toward the car, she hears an alarm frequency of 872.10 Hz.
    5·1 answer
  • What are the characteristics of high energy wave?
    12·1 answer
  • Please help! the mass of an object is measured on a pan balance with a precision of 0.005 g and the recorded value of 128.01 g.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!