Understanding Atomic Structure

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App

Questions and Answers

What is contained within the nucleus of an atom?

  • Neutrons and Electrons
  • Protons and Electrons
  • Protons and Neutrons (correct)
  • Electrons only

What is the charge of a proton?

  • Negative
  • Varies
  • Neutral
  • Positive (correct)

What is the charge of an electron?

  • Neutral
  • Variable
  • Positive
  • Negative (correct)

Which particles contribute to the mass number of an atom?

<p>Protons and Neutrons (B)</p> Signup and view all the answers

What is the atomic number of an atom equal to?

<p>Number of Protons (A)</p> Signup and view all the answers

How do you calculate the number of neutrons in an atom?

<p>Mass Number - Atomic Number (A)</p> Signup and view all the answers

In a neutral atom, which particles are equal in number?

<p>Protons and Electrons (D)</p> Signup and view all the answers

What does the number 35 represent in the nuclide notation for Cl (Chlorine)?

<p>Mass Number (D)</p> Signup and view all the answers

How many neutrons are in an atom of chlorine-35?

<p>18 (A)</p> Signup and view all the answers

Outside the nucleus, electrons fill what?

<p>Shells (C)</p> Signup and view all the answers

How many electrons can the first electron shell hold?

<p>2 (B)</p> Signup and view all the answers

How many electrons can the second electron shell hold?

<p>8 (A)</p> Signup and view all the answers

What is the electron arrangement for sodium (Na), which has 11 electrons?

<p>2, 8, 1 (C)</p> Signup and view all the answers

What do elements in the same group have the same number of?

<p>Outer electrons (D)</p> Signup and view all the answers

The number of outer electrons fixes the chemical ________ of a group.

<p>Properties (D)</p> Signup and view all the answers

What is the mass of a electron?

<p>0 (C)</p> Signup and view all the answers

Flashcards

Proton

Positively charged particle located in the nucleus with a mass of 1.

Neutron

Neutral particle located in the nucleus with a mass of 1.

Electron

Negatively charged particle located outside the nucleus with a mass of 0.

Mass Number

Total number of protons and neutrons in an atom's nucleus.

Signup and view all the flashcards

Atomic Number

Number of protons in an atom's nucleus.

Signup and view all the flashcards

Number of Neutrons

Mass Number - Atomic Number

Signup and view all the flashcards

Neutral Atom

Number of protons equals the number of electrons.

Signup and view all the flashcards

Nuclide Notation

The arrangement of mass number and atomic number around the element symbol.

Signup and view all the flashcards

1st electron shell

Innermost electron shell closest to the nucleus.

Signup and view all the flashcards

2nd electron shell

Shell that is the second closest to the nucleus that hold up to 8 electrons.

Signup and view all the flashcards

3rd electron shell

Shell that is the third closest to the nucleus that hold up to 8 electrons.

Signup and view all the flashcards

Group

Elements in the same vertical column of the periodic table.

Signup and view all the flashcards

Study Notes

  • Atoms contain electrons outside the nucleus, and protons and neutrons inside the nucleus.
  • Protons have a positive charge and a mass of 1.
  • Neutrons have no charge and a mass of 1.
  • Electrons have a negative charge and a mass of 0.
  • Mass Number = Number of Protons + Number of Neutrons.
  • Atomic Number = Number of Protons.
  • Number of Neutrons = Mass Number – Atomic Number.
  • In a neutral atom, the Number of Protons = Number of Electrons.
  • Nuclide Notation includes Mass Number and Atomic Number.
  • For example, Chlorine (Cl) has a mass number of 35 and an atomic number of 17.
  • Therefore it has 17 Protons, 17 Electrons, and 18 Neutrons.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser