8.5ABC - Review 1

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

• 36 neutrons
• 84 neutrons
• 48 neutrons

Tags

NGSS.MS-PS1-1

An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the atom's nucleus?

• +25
• +30
• -25
• -30

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NGSS.MS-PS1-1

Which of these best describes one of the subatomic particles that has a mass of 1 atomic mass unit but no charge?

• protons
• neutrons
• electrons

A model of a beryllium atom is shown below. 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

What is the mass number of a potassium (K) atom that has 20 neutrons?

• 18
• 19
• 20
• 39

Tags

NGSS.MS-PS1-1

Protons identify elements. What element has 5 protons? 

• Beryllium
• Boron
• Carbon
• Oxygen

Tags

NGSS.MS-PS1-1

Nucleus

• the positively charged center of an atom containing the protons and neutrons
• a (neutral) particle with no electrical charge within the atomic nucleus
• total number of protons and neutrons in a specific atom
• the vertical columns on the Periodic Table

Periods

• the horizontal rows on the Periodic Table
• a conceptual model in which the elements are organized according to their properties; often displayed as a chart
• the positively charged center of an atom containing the protons and neutrons
• a (neutral) particle with no electrical charge within the atomic nucleus

Groups (families)

• the vertical columns on the Periodic Table
• a pure substance that cannot be broken down chemically into simpler substances
• the negatively charged space containing electrons that surrounds the atomic nucleus
• a negatively charged particle in the electron cloud surrounding the atomic nucleus

Electron Cloud

• the negatively charged space containing electrons that surrounds the atomic nucleus
• a negatively charged particle in the electron cloud surrounding the atomic nucleus
• a property of a subatomic particle; positive (protons), negative (electrons), or neutral (neutrons)