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3 years ago

Which of the following describes an isotope?

Physics

1 answer:

algol133 years ago

8 0

Answer:

2. atoms of an element that have the same number of protons and a different number of neutrons

Explanation:

Isotopes of an element is made up of atoms of an element that have the same number of protons and a different number of neutrons.

The number of protons are the positively charged particles in an atom

The number of neutrons are the uncharged particles.

Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences in the number of neutrons in their carious nuclei.

Isotopes have have the same electronic configuration and hence will have similar chemical properties. They only differ in their masses.

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A student slides down a slide at recess. After getting off the slide he goes to cross the monkey bars. As he touches the metal o

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He created static electricity by going down the slide, which was kept in his body and then transferred onto the conductive surface of the monkey bars

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3 years ago

1. Why is the theory that all things are made up of atoms a theory and not a fact?

steposvetlana [31]

Because there is no record of all things. As we have partially unknow information, it can never be held as a fact.

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3 years ago

A microscope has an objective lens with a focal length of 14.0mm . A small object is placed 0.80mm beyond the focal point of the

Nikolay [14]

Answer:

A. 260 mm

B. - 18

C. 175

Explanation:

The expression for the lens equation is

$\frac{1}{f} = \frac{1}{u} + \frac{1}{v}$

$\frac{1}{14.0mm} = \frac{1}{14.80 mm} + \frac{1}{v}$

$\frac{1}{v} = \frac{1}{14.0} - \frac{1}{14.80}$

v = 259 mm

= 260 mm or 26 cm (to 2 s.f)

check the attached files for additional solution

3 0

3 years ago

How does the wavelength emitted by an object relate to its temperature?

OlgaM077 [116]

Explanation:

I haven't actually seen the answer I'm looking for but I think the answer is when temperatures are lower the wavelength is longer

8 0

3 years ago

When hydrogen shares electrons with oxygen, the outermost shell of the hydrogen atoms are full with :

Alja [10]

Hydrogen is written as H2 and oxygen is written as O2

When they bond it is a covalent bond.

Hydrogen has 1 negative electron , which would attract one from oxygen, so its outer shell would have 2 electrons.

Oxygen outer shell holds 8 electrons.

The answer is

2 and 8

6 0

3 years ago

Read 2 more answers