If atoms are made up of smaller particles, such as protons, neutrons, and electrons, then why are atoms considered the smallest particles of an element?

Answers

Answer 1

Answer: Because all protons are the same, all neutrons are the same, and all electrons are the same, and all atoms of all elements are made of them, so the smallest particles of every element are the same particles. It's only when some number of them get together and make an atom that the properties of an element begin to show up.

Let me try it like this, and see if this does anything for you:

All buildings are made of brick, cement, wood, glass, pipes, wires, etc.
But all bricks are the same, all cement is the same, all glass is the same, etc.
Houses, stores, shacks, skyscrapers, and hunting lodges are all made of them.
You don't know what kind of building you have, until some brick, some cement,
some wood and some glass all get put together.

Similarly, you don't know what kind of atom ... of what element ...you have, until
some protons, some neutrons, and some electrons get put together

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A cube is measure 1 cm on each side and has a mass of 2 grams. Will it float on water?

Answers

Density = mass/volume
The density of water is 1g/cm^3

Density of the cube=2g/1cm^3
Density=2g/cm^3
Anything over the density of water will sink. The cube will not float.

Mildred takes a pound of frozen hamburger meat out of the freezer and puts it into the refrigerator.Which of the following best describes the direction of heat flow?
A. from the air in the freezer to the air in the refrigerator
B. from the hamburger to the air in the refrigerator
C. from the air in the refrigerator to the hamburger
D. from the hamburger to the air outside the refrigerator

Answers

The meat in the freezer is frozen.
Everything else in the freezer is frozen too.
Nothing in the refrigerator is frozen.
The freezer is colder than the refrigerator.

Mildred takes a pound of frozen hamburger meat out of the freezer
and puts it into the refrigerator. The meat is colder than anything
else that's in there.

Heat flows from the air in the refrigerator into the frozen hamburger (C)
and warms up the meat. When the temperature of the meat warms up
to the temperature of the air in the refrigerator, the heat stops flowing.

When applying the process of science which of theseis tested 1.a question, 2.an observation, 3.a conclusion, 4.a prediction

Answers

4. a prediction

Explanation:

According to the scientific method, an experiment is conducted to test a prediction/hypothesis stemming from the previous question.

A conclusion ... usually called a "theory" ... is tested. (3)

One great way to test a conclusion is to follow up on its predictions, and see how they turn out.

Katya listed major questions that scientists try to answer when they classify organisms. Her list included the following questions: How many living things are there? What are the characteristics that define living things? What additional question would be best for Katya to add to her list about classification? How do living things get energy? What do living things need to survive? Where do living things make their home? How are living things related?

Answers

An ecosystem can only sustain so many organisms. That limit would be its carrying capacity. If the population goes above that number then other factors will cause the population to crash and then rebound to a constant level.

Answer:

an ecosystem can only certain so many organisms.

You must exert a force of 4.5 N on a book to slide it across a table. If you do 2.7J of work in the process, how far have you moved the book?

Answers

Answer: 0.6m

Explanation:

Given that:

force = 4.5 N

Work done = 2.7J

Distance moved by the book = ?

Since work is done when force is applied on an object over a distance, apply the formula:

work = force x distance

2.7J = 4.5N x distance

Distance = (2.7J / 4.5N)

Distance = 0.6 m

Thus, the book was moved 0.6 metres far

A wave has a wavelength of 30 mm and a frequency of 5.0 hertz. What is its speed?

Answers

   Wave speed = (frequency) x (wavelength)

   = (5 / second) x (30 mm)

   = 150 mm/second = 0.15 meter/second .

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A living thing is called?