Atoms Structure

The diagram shows a model of an atom. The model contains three different subatomic particles. Particles X and Y are inside the nucleus, and particle Z is outside of the nucleus. Which statements best describe the charges on the particles in this model?

• Both particles X and Y have a positive charge.

  Particle Z has a negative charge.

• Both particles X and Y have a negative charge.

  Particle Z has a positive charge.

• Either particles X or particle Y has a positive charge.

  Particle Z has a negative charge.

• Either particles X or particle Y has a negative charge.

  Particle Z has a positive charge.

Tags

NGSS.MS-PS1-1

Which table correctly identifies the charges of subatomic particles?

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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 element?

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

• An 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.

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

Tags

NGSS.MS-PS1-1

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?

How many protons, neutrons, and electrons are present in an atom of hafnium, Hf, with a mass number of 178?

• 72 protons, 178 neutrons, 106 electrons

• 72 protons, 106 neutrons, 72 electrons

• 178 protons, 250 neutrons, 72 electrons

• 106 protons, 72 neutrons, 106 electrons

Tags

NGSS.MS-PS1-1

An atom of a certain element has 36 protons, 36 electrons, and a mass number of 84. At room temperature this element is a very stable gas. How many neutrons are in this atom?

What types of particles are found in the cloud surrounding the atom's nucleus?

• Positively charged particles and negatively charged particles

• Negatively charged particles only

• Neutral particles and positively charged particles

• Positively charged particles only

Tags

NGSS.MS-PS1-1