If atoms are made of smaller parts such as electrons, why are atoms considered the basic unit of matter?

1 answer:

8 0

Firstly, atoms are also composed of protons and neutrons as well as electrons.

Now, to answer your question... Atoms are the smallest you can go while still having it be an element, hence the definition ''the basic unit of a chemical element.'' It is the smallest unit that has the chemical properties of an element. However, atoms still need these charges to be atoms. Without electrons, they'd just be ions. Hope this helps.

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Iron (III) oxide - what does the III mean?

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Put these different types of radiation in order from MOST to LEAST penetrating.

Naily [24]

Answer:

C. Gamma > beta > alpha

Explanation:

Alpha rays : These are positively charged and have mass 4u. These contain high energy Helium nucleus with 2 proton and 2 neutron.

These are heavier and maximum charged than beta and gamma particles.They have low velocity,least penetration power (can't travel more than 10-18 cm).

Beta rays : They are negatively charged and have negligible mass.

On emmission of beta particle, neutron is divided into proton and electron. They have less mass and very high velocity, so their penetrating power is more than alpha particles.

Gamma rays: These are parts of electromagnetic spectrum and travel with the speed of light (maximum velocity).Gamma rays do not have mass have maximum penetrating power.