TEKS 8.5(A) Structure of Atoms

Which of these statements about the mass of subatomic particles are true?

• The mass of a proton is the same as the mass of an electron.

• The mass of a neutron is the same as the mass of an electron.

• The mass of a neutron is much greater than the mass of a proton.

• The mass of a proton is much greater than the mass of an electron.

Which table correctly identifies the charges of subatomic particles?

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Tags

NGSS.MS-PS1-1

If a fluorine atom has a mass number of 19, how many neutrons are in the atom?

How many neutrons are in the nucleus of a potassium atom with a mass number of 39?

The atomic number of krypton is 36. If the mass number of a krypton atom is 84, which table shows the number of subatomic particles inside and outside the nucleus of the krypton atom?

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Tags

NGSS.MS-PS1-1

Which statement accurately describes the atoms of a specific elements?

• An indium, In, atom contains 115 protons inside the nucleus and 49 neutrons outside the nucleus.

• A scandium, Sc, atom contains 45 electrons outside the nucleus and 21 neutrons inside the nucleus.

• An aluminum, Al, atom contains 27 electrons and 27 protons inside the nucleus.

• A zinc, Zn, atom contains 30 protons inside the nucleus and 30 electrons outside the nucleus.

Tags

NGSS.MS-PS1-1

Which statement correctly describes the location and charge of the electrons in an atom?

• The electrons are inside the nucleus and have no charge.

• The electrons are outside the nucleus and have no charge.

• The electrons are inside the nucleus and have a negative charge.

• The electrons are outside the nucleus and have a negative charge.

What is the total number of protons, neutrons, and electrons in a cadmium, Cd, atom that has a mass number of 112?

What is the difference between the number of electrons in an atom of selenium. Se, and the number of electrons in an atom of aluminum, Al?