A-Level Chemistry Atoms Elements and Molecules_1&2

Which of the following is true about the periodic table?

• 
  A) Each box contains a lower case letter
  

• B) Each box contains a number
  

• C) Each box contains a capital letter or a pair of letters
  

• D) Each box contains a symbol

Match the following

• What element do we breathe?

• Oxygen

• What is the name of the table that contains a capital letter or pair of letters representing ELEMENT

• Periodic table

• What element is used to make bodies of cars and bicycles?

• Iron

In Periodic table, The first one is always a ​ (a)   and

the second one is ​ (b)   a capital letter

• capital letter
• never
• lower case
• italics

What is an element?

• 
  A) A substance that contains atoms of only one type
  

• B) A substance that can be broken down using chemical reactions
  

• C) A substance that contains neon atoms
  

• D) A substance that cannot be broken down into atoms of any other element

Which of the following statements correctly defines an element?

• A) An element is a substance that contains atoms of different types.

• B) Elements are chemically complex substances that can be broken down using chemical reactions.

• C) An element is a substance that contains atoms of only one type.

• D) Elements are substances that can be broken down into other elements.

Which of the following substances is considered an element?

• A) Neon

• B) Water

• C) Hydrogen

• D) Oxygen

Which of the following statements about elements and isotopes is true?

• A) All elements contain isotopes.

• B) Isotopes have different numbers of protons and electrons.

• C) Elements cannot be broken down into isotopes.

• D) Isotopes of the same element have the same number of protons and electrons but different numbers of neutrons.

What is an isotope? 

• A charged atom
• An atom with different amounts of neutrons
• An atom with different amounts of protons
• A neutral atom

Isotopes of an element have a different number of...

• Protons

• Neutrons

• Electrons

• Mass

Which of the following isotopes are stable isotopes of neon?

• A) 20 Ne

• B) 21 Ne

• C) 22Ne

• D) 19Ne