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Tpy6a [65]
3 years ago
4

Different microscopic organisms cause different diseases. When a dangerous microscopic organism is transferred from one person t

o many people, the disease it carries will spread.
Why is this considered a theory instead of a hypothesis or a law?

a. It is a statement of fact about how nature works instead of an explanation.
b. It provides an explanation for many observations and accepted hypotheses.
c. It describes how to test a possible explanation of one specific relationship.
d. It has not changed over time even though new technology has been developed.
---
Which statement is a scientific law?

a. Scientists use genes to explain why evolution happens.
b. Genes are long patterns that are similar to computer codes.
c. A person’s traits are controlled by different forms of a gene.
d. The discovery of genes changed how scientists think about life.
---
Different microscopic organisms cause different diseases. When a dangerous microscopic organism is transferred from one person to many people, the disease it carries will spread.

Why is this considered a theory instead of a hypothesis or a law?

a. It is a statement of fact about how nature works instead of an explanation.
b. It provides an explanation for many observations and accepted hypotheses.
c. It describes how to test a possible explanation of one specific relationship.
d. It has not changed over time even though new technology has been developed.
---
Which is the order of microscopes, from greatest magnification to the least?

a. scanning tunneling → transmission electron → compound light
b. scanning tunneling → compound light → transmission electron
c. transmission electron → scanning tunneling → compound light
d. compound light → transmission electron → scanning tunneling
Chemistry
2 answers:
Scorpion4ik [409]3 years ago
7 0

The correct answer for number 1. B and the correct answer for number 2. should be D              


Bess [88]3 years ago
5 0
For number 1 its B for 2 its D
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A neutral atom of sodium (Na) has an atomic number of 11 and a mass number of 23. How many neutrons would be found in the nucleu
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<h3>Answer:</h3>

12 neutrons

<h3>Explanation:</h3>
  • A neutral atom is an atom that has no charge, which means it has no additional electrons or electrons removed from its energy levels.
  • An atom is made up of sub-atomic particles neutrons and protons found in the nucleus and electrons found in the energy levels.
  • The number of protons in the nucleus of a neutral atom is known as the atomic number.
  • In a neutral atom, the atomic number is equal to the number of electrons as protons are equal to the number of electrons.
  • The sum of protons and neutrons in the nucleus of an atom is known as the mass number of an atom.

Therefore;

Protons = Atomic number

Protons + neutrons = Mass number

Thus;

Neutrons = Mass number - protons or

                = Mass number - atomic number

In this case;

Atomic number = 11

Mass number = 23

Thus;

Neutrons = mass number - atomic number

               = 23 - 11

              = 12 neutrons

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