PHYSICS MIDDLE SCHOOL

When a potassium atom forms an ion, it loses one electron. What is the electrical charge of the potassium ion? A.
-1

B.
-2

C.
+1

D.
+2

Answers

Answer 1
Answer: The correct answer is answer choice C. +1. Since electrons have negative charges, losing one electron will cause the atom to have a positive charge of 1. This charge comes from the protons, which, until one electron was lost, balanced out the negative charge of the electrons and caused the atom to be neutral.

Related Questions

The force applied when using a simple machine ??
What is a bright, star like object in the galaxy core
Electric resistance ____________ with a(n) ____________in the length of a wire and as a result current flow ___________.A) decreases; decrease; increases B) decreases; increase; increases C) increases; decrease; decreases D) increases; increase; decreases
Fireworks change _____ into ______ and ________ energy.
The slope on a distance-time graph shows a ball moving from 20 m to 40 m in 1 s and from 40 m to 80 m in the next second

What unsusual characteristic do the cysts of brine shrimps, the resurrection fern and Tardigrades. What adaptations do they have which enable them to survive when other organisms would die?

Any help would be much appreciated.

Answers

Brine shrimps can reproduce in two ways. 1) viviparious or live reproduction and 2) oviparious or production of eggs that hatch after being expelled from the body. The eggs, coated in chorion coating, are called cysts.

Through the reproduction of cysts, the survival of brine shrimps increase even when dealing in extreme conditions. The cysts can remain in total stasis for two years in oxygen less surroundings, they can survive freezing temperature and boiling tempreture. When conditions improve and eggs are placed in salt water, they hatch within a few hours and increase the population of brine shrimps.

Resurrection ferns are called as such because they resurrect after they shrivel, though the fern does not really die. In extremely hot or conditions, these ferns can lose 75% of their water content, even losing 97% water content if suffering under extreme drought, causing them to shrivel and look like dead ferns. But, when these ferns are again exposed to water, they resurrect and becomes green and healthy. This unusual ability help these ferns to survive under extremely harmful conditions.

Tardigrades are known as nature's toughest animals. They can live in solid ice, intense radiation of space, and boiling water. They can also survive in the desert for ten years without drinking water, as well as, in the deepest part of the sea. Their survival is based on their unusual characteristic to change their form to survive without water.

In the absence of water, tardigrades can completely dry out. The absence of water in their body urges them to replace it with a sugar called trehalose. Trehalose then becomes their source of life until water becomes available to tardigrades for consumption.

How does secondhand smoke affect children?It increases their asthma rates.
It increases their attention span.
It increases their learning ability.
It increases their chance of obesity.

Answers

Answer:

It increases asthma rates

Explanation:

What happens to the ratio when an excess quantity of a reactant exists?

Answers

The ratio will remain the same and the and the extra reactant will just be left.

Hope I helped !

What object circles around a planet

Answers

A object that circles around a planet is called a satellite.
an object that circles around a planet is a satellite. earth's satellite is the moon.

which theory states that all of the life on the planet is decended from an orginal life form that lived 3.5 billion years ago

Answers

Answer:

universal common ancestor

Galileo conducted controlled experiments to find out if the mass of the pendulum bob affected the period of the swing. Write a description of how he might design his experiment. Thanks!

Answers

According to my guesses, he should have swung the pendulam bob and noted its time period. In order to observe the effect of mass, he would have repeated the experiment with varied pendulam bobs. Hope this helped! 
Other Questions
How far does the car travel from t=2 hrs to t=4 hrs? Here's a pic of Displacement vs. Time for a Car
student built a simple heat engine that could lift masses. If the heat engine takes in 300 J of heat and loses 50 J to the environment, how much height will it lift a 1.5 kg mass?
What is a period and how does it work
A soccer ball collides with another soccer ball at rest. the total momentum of the ballsa) is zerob) increasedc) remains constantd) decreases