Properties of atoms

The smallest electrically neutral particles showing the properties of an element are?

• 1. protons

• 1. neutrons

• 1. electrons

• 1. atoms

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NGSS.MS-PS1-1

An atom of aluminium has 13 protons and 14 neutrons in its nucleus.  Another atom has 14 protons and 14 neutrons in its nucleus.  This atom must be?

• 1. a charged aluminium ion

• 1. an isotope of aluminium

• 1. an atom of an element other than aluminium

• an imaginary particle since it could not exist in nature

Tags

NGSS.MS-PS1-1

The fundamental particles found in the nucleus of the atom are

• 1. protons only

• 1. neutrons only

• 1. protons and neutrons

• 1. electrons and neutrons

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NGSS.HS-PS1-8

The electronic structure 1s²2s²2p⁶3s²3p⁶ corresponds to the species

• 1. O^2-

• 1. S^2-

• 1. Al³⁺

• Na⁺

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A fluorine atom has the symbol F.  A fluoride ion has the symbol F^-  A fluorine ATOM differs from a fluorine ION in that the atom has

• 1. fewer electrons

• 1. more electrons

• 1. fewer protons

• 1. more protons

Tags

NGSS.HS-PS1-1

The ionic charge of calcium in Ca(OH)2 is

• 1+

• 2+

• 3+

• 2-

Tags

NGSS.HS-PS1-1

Which group is most electronegative

• Alkali metals (Group 1)

• Noble Gases (Group 8)

• Halogens (Group 7)

• Transition metals

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The number of valence electrons present in sulfur atoms...

• 4

• 5

• 6

• 0

Tags

NGSS.HS-PS1-1

Which of the following is the correct size of nanoparticles?

• They are 1-100 nm in diameter

• They are 1-100 µm in diameter

• They are 1-1000 nm in diameter

• They are 1-1000 µm in diameter

Which is correct for the chromium isotope, 5324Cr

• 24 neutrons and 53 neutrons

• 24 neutrons and 77 neutrons

• 24 neutrons and 29 neutrons

• 53 neutrons and 24 neutrons

Tags

NGSS.HS-PS1-8