Question 12 (2 points)
Which elements are least reactive?
metals
halogens
actinides
noble gases

Answers

Answer 1

Answer:

noble gases

Explanation:

Answer 2
I believe it is noble gasses because, if I’m not mistaken, they are not reactive at all.

Related Questions

a screwdriver wheel has a radius of 5cm while the axle has a radius of .5cm. what is the mechanical advantage of the screwdriver?​

Answers

Answer:10cm

Explanation:5 / .5=10

why would you want to know the speed of an object

Answers

Answer:

Because when something is moving  such as a car if your going too fast there could be a crash or collision.

Explanation:

2. What type of signals does the nervous system send? What carries these signals

Answers

Answer:

Nervous system messages travel through neurons as electrical signals. When these signals reach the end of a neuron, they stimulate the release of chemicals called neurotransmitters. Neurotransmitters travel across synapses, spaces between neurons or between neurons and other body tissues and cells.

Explanation:

What the person above me said is correct:))

A. Ears
B. Air
C. Water
D. Rocks

Answers

Answer:

A Ears

Explanation:

hgvjjghingyjbvh

what's electron affinity? and what is the formula of electric current?​

Answers

Answer:

Electron affinity is the energy change that results from adding an electron to a gaseous atom. For example, when a fluorine atom in the gaseous state gains an electron to form F⁻(g), the associated energy change is -328 kJ/mol.

Give brainliest please.

Answer:

Electron affinity is the energy change that results from adding an electron to a gaseous atom.

Sorry I don't know about the second one.

PLS HELP WTH THIS FOR BRAINLIEST

Answers

Answer:

1. Pioneer

2. Primary

Explanation:

Pioneer Species are the first organisms to colonize barren environments.

Primary Succession is the development of an ecosystem of a barren environments!

I hope this helped! :)

Answer:

The first answer is Pioneer and I think the second is Primary

Explanation:

Which three rocky planets have atmospheres

Answers

Venus, Earth, and Mars
Hope that helps
Venus Earth and Mars

List three unique examples of situations in your daily life where expansion and contraction occur.

Answers

when you put ice in the freezer, the water expands when in gets cold.
the sidewalks have cracks in them to make room for the expansion and contraction when it heats up and cools down.
as you drive a car, the heat from combustion causes metal to expand. when you turn the car off, the metal cools down and contracts

What is the speed of a wave that has a wavelength of 2 m and a frequency of 1.5 hz? Show your calculations!

Answers

Answer:

3 m\s Ans .....

Explanation:

Solution:

v = (1.5)(2)

v = 3 m\s Ans ........

What are the dangers of a hurricane and how do you stay safe during the hurricane

Answers

Answer

hdhcu very much xbeyxbuxbduxb shx

What is the difference between a pure
substance, solution, and mixture?

Answers

 A pure substance cannot physically be separated, and is made out of one atom (or molecule). Unlike a mixture, however, which are made out of two or more atoms or molecules. A solution in itself is the example of a mixture. (The composition of a pure substance being fixed, and a mixture's being varying depending on which.) And a solution branching off from a mixture into being either homogeneous mixtures or heterogeneous mixtures.

srry it kinda turned into a paragraph lol, feel free to add or take away anything :)

HELP PLEASE!!!

Gravity helps us watch television, talk on the phone, and use the Intemet.
Explain whether this statement is true or false.
Support your answer with evidence from the text.

Answers

Answer:

Technically yes, it does help those objects not to float away, but that is false. gravity is not the factor that lets us watch tv, talk on the phone etc.

Gravity helps us watch television, talk on the phone, and use the Internet. This is true statement.

What is the process of  satellite orbiting?

The goal of satellites is to achieve balance. They rotate around the globe quickly enough to avoid being entirely drawn down into the planet's center of gravity, yet slowly enough to avoid drifting out into space.

When a satellite is travelling at the right speed, the earth's gravitational attraction is just strong enough to keep it in place. A satellite must move quicker to maintain orbit the nearer it is to the earth's surface. Additionally, satellites' orbits are circular or elliptical due to the continual pull of the curved surface of the planet.

Therefore, gravity plays a crucial role in our daily lives, whether it's keeping us anchored to the planet's surface or keeping the satellites we use to communicate and learn more about our environment in orbit.

Learn more about satellite here:

https://brainly.com/question/9266911

#SPJ2

How many seasons are there in a year

Answers

Answer:

There are 4

Explanation:

Four seasons
Summer winter autumn and spring

If 10 crests and 10 troughs pass through a point in 5 seconds. Calculate its time period and frequency?

Answers

Answer:

frequency = 5 /s

period = 0.5 s/

Explanation:

number of revolution = 10+10/2 = 20/2 = 10

frequency = n/t = 10/5 = 5 /s

period = t/n = 5/10 = 0.5s

Every force applied to an object will cause the object to move.

Answers

Answer:

Yes your correct.

Explanation:

True you are right above that

the law of inertia states that an object in motion will stay in motion, and an object at rest will stay in rest unless acted upon by an unbalanced force which law of motion is this describing

Answers

Answer:

newton's first law of motion

Explanation:

this is because newton's first law of motion states that every object will continue in its state of rest or uniform motion in a straight line unless a resultant force acts on it so...

isn't this similar to the law of inertia?

yes it is

hope this helps

What are the dangers of a thunderstorm and how do you stay safe during the thunderstorm?

Answers

Answer:

you get struck by lightning

Explanation:

hide in ur house

Answer: The dangers of thunderstorms is lightning, flash floods, and thunder.

To stay safe stay inside, do not take a shower/bath, stay away from waterfalls, and try not to touch anything metal.


40 Newtons
30 Newtons
20 Newtons
10 Newtons
Which statement is TRUE about the picture above?
A
The spheres have only weight but no mass.
B
The 40 Newton sphere has the greatest gravitational force.
The smaller the weight, the greater the gravitational force
D
Although the weights of the spheres are different, the gravitational forces
are the same
Sign out
04:04

Answers

Although the weight of the spears a different the gravitational forces are the same

A 10 ohm resistor has 2.5 amps running
through it. What is the voltage?

Answers

Answer:

10*2.5=25

Explanation:

The answer is 25 volts

Answer:

25 Volts

Explanation:

2.5 multiplied by 10 is 25.

What happens to the molecules when the solid changes phase?

Answers

they begin to move quickly and can break away from other molecules

Answer:

When solid changes atoms/molecules begin to speed up and move around. Compared to when they are in the solid phase, where they barely move and are slow and are compacted.

What are the dangers of a hurricane and how do you stay safe during the hurricane?

Answers

Answer:

go to the vault

Explanation:

A 2.0 kg cart has a momentum of 10.0 kg m/s. What is its velocity?


A.)22 m/s

B.) 2.0 m/s

C.) 5.0 m/s

D.) 20. m/s

Answers

Answer:

[tex]\boxed {\boxed {\sf C. \ 5.0 \ m/s}}[/tex]

Explanation:

Momentum is the product of mass and velocity. The formula is:

[tex]p=mv[/tex]

The mass of the cart is 2.0 kilograms. The momentum is 10.0 kg m/s. The velocity is unknown.

[tex]m= 2.0 \ kg \\p= 10.0 \ kg \ m/s[/tex]

Substitute the values into the formula.

[tex]10.0 \ kg \ m/s= (2.0 \ kg ) v[/tex]

We want to solve for the velocity (v). Therefore we must isolate the variable. It is being multiplied and the inverse of multiplication is division. Divide both sides of the equation by 2.0 kg.

[tex]\frac { 10.0 \ kg \ m/s}{2.0 \ kg}=\frac{(2.0 \ kg )v}{2.0 \ kg}[/tex]

The kilograms will cancel each other out.

[tex]\frac { 10.0 \ m/s}{2.0}=v[/tex]

[tex]5.0 \ m/s=v[/tex]

The velocity is 5 meters per second.

PLZZZZZ I NEED HELP Which is an adaptation that helps birds maintain a stable body temperature? A. air sacs connected to lungs B.large chest muscles C.down feathers D. nearly hollow bones

Answers

Answer:

c

Explanation:

trust

Answer: I thinks it‘s the feathers

Explanation:

Bc feathers are warm and the hollow bones are to make the bird lighter so it can fly, the chest muscles don’t make heat, and the air sacs are probably for storing air

What type of force causes your car to move?

Answers

Answer:

frictional force

Explanation:

6. Dentists use a soft, clay-like material to make a filling for a cavity. The filling stays soft under the
light of the dentist's lamp, but it hardens when the dentist shines an ultraviolet flashlight on it. Why
does light from the ultraviolet flashlight harden the filling when light from the lamp does not?

Answers

Because ultraviolet light may be absorbed by the filler substance, but not by the lamp's light. Because UV light extracts energy from the filler substance while lamp light does not.

What is ultravoilet ray?

Ultraviolet Rays in the electromagnetic Spectrum Ultraviolet rays are a kind of electromagnetic radiation that extends from the visible light spectrum to the X-ray area.

Harmful rays have a long-term effect on humans, causing skin and eye problems. It is also a source of Vitamin C.

Because ultraviolet light may be absorbed by the filler substance, but not by the lamp's light. Because UV light extracts energy from the filler substance while lamp light does not,

Hence light from the ultraviolet flashlight harden the filling when light from the lamp does not.

To learn more about the ultravoilet ray refer to thr link;

https://brainly.com/question/25780677

Two ways I can decrease the force attraction between two charged objects?

Answers

Answer: Change distance and charge

Explanation:

Increase the distance between the two particles, and remove charge from one or more of the particles.

Coulomb's Law is:

[tex]F=\frac{kq_1q_2}{r^2 }[/tex]

k being a constant of 8.99 x 10^9 (units)

q1 and q2 being the magnitude of charges

r being the distance between them

9. True or False: Sawmills and gristmills are machines that do not need
access to a water source.*
2 points
Pls help

Answers

Answer:

true can i get brainliest :)

Explanation:

what percentage of americans get no exercise in a day

Answers

Answer:

95%

Explanation:

Answer:

0%

Explanation:

im not sure kasi i dont understand the question.....

ILL GIVE BRAINLYyYYYyYYyyyyy
The best thermal insulators _____________________.


have free electrons.


are metals.


conduct heat well.


are gases.

Answers

Answer:

The best thermal insulators have free electrons

What would you have loved to press the pause button on so you could go deeper

Answers

Answer:

~Banana Fish~

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