Fluorine has an atomic number of 9. What can you conclude about an atom of fluorine from this fact?

it has a boiling point of 9 degree celsius

The reactivity of an atom is determined by –

its number of valence electrons

the radius of the atom's nucleus

the orbital path of its electrons

Which statement best describes an electron?

Smaller mass than a proton and a negative charge

Smaller mass than a proton and a positive charge

Greater mass than a proton and a negative charge

Greater mass than a proton and a positive charge

Which statement about the atomic nucleus is correct?

The nucleus is made of protons and neutrons and has a positive charge

The nucleus is made of protons and neutrons and has a negative charge

The nucleus is made of electrons and has a positive charge

The nucleus is made of electrons and has a negative charge

Which of the following statements most directly relates to Chlorine's reactivity?

Chlorine atoms have 7 valence electrons

Chlorine atoms have 17 protons in their nucleus

The average mass of a chlorine atom is 35

Chlorine atoms have 3 energy levels

Valence electron are an important part of every atom. Which of the following accurately describes valence electrons?

They are negaivly charged and in the outer energy level

They are positively charged and found in the nucleus

They are electrically neutral and located in the nucleus

They are positively charged and found in the electron cloud

Group 18 on the periodic table is called the Noble Gases. Neon is a gaseous element that belongs to this group, and it is chemically unreactive and very stable. Which of the following relates to its chemical reactivity?

They have 2 electron energy levels

Atoms with similar properties are most likely located...

to the right and left of each other.

Science TEKS Atoms

Authored by Charles Martinez

Chemistry

8th Grade

NGSS covered

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45 questions

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MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What number indicates the nucleus?

Tags

NGSS.HS-PS1-8

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Where is most of the mass in an atom located?

in the nucleus

in the protons

in the neutrons

in the electrons

Tags

NGSS.HS-PS1-8

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The particles with no charge in an atom are the _______.

electrons

neutrons

protons

protons and neutrons

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the atomic number?

number of protons

number of neutrons

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

valence electrons can be describe as the ________

electrons in the first energy level

electrons closest to the nucleus

electrons in the outermost level

electrons and electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

This particle determines what element you have - the elements identity.

electron

proton

neutron

valence shell

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which particles make up the nucleus of an atom?

protons and neutrons

electrons and protons

electrons, protons, and neutrons

electrons and neutrons

Tags

NGSS.HS-PS1-8

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Science TEKS Atoms

What number indicates the nucleus?

Where is most of the mass in an atom located?

The particles with no charge in an atom are the _______.

What is the atomic number?

valence electrons can be describe as the ________

This particle determines what element you have - the elements identity.

Which particles make up the nucleus of an atom?

How many protons are in Zirconium (Zr) ?

How many valence electrons are in the outer shell of Xenon (Xe) ?

Fluorine has an atomic number of 9. What can you conclude about an atom of fluorine from this fact?

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