The Periodic Table and Writing Chemical Formulas (Junior Cert Science): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does the period number tell you about an element?
What does the period number tell you about an element?
Number of electron shells
How many electrons are in the outer shell of Group VII elements?
How many electrons are in the outer shell of Group VII elements?
7 electrons
An element has atomic number and mass number . How many neutrons does it have?
An element has atomic number and mass number . How many neutrons does it have?
22
What is the maximum number of electrons the second shell () can hold?
What is the maximum number of electrons the second shell () can hold?
8 electrons
What charge do Group II elements form when they lose electrons?
What charge do Group II elements form when they lose electrons?
What is the formula of lithium oxide formed from Li and O ions?
What is the formula of lithium oxide formed from Li and O ions?
LiO
Which type of elements combine to form ionic compounds?
Which type of elements combine to form ionic compounds?
Metal and non-metal
How many hydrogen atoms combine with a Group V element in covalent compounds?
How many hydrogen atoms combine with a Group V element in covalent compounds?
3 hydrogen atoms
How many lone pairs of electrons does oxygen have in a water (HO) molecule?
How many lone pairs of electrons does oxygen have in a water (HO) molecule?
2 lone pairs
How many covalent bonds does carbon form in methane (CH)?
How many covalent bonds does carbon form in methane (CH)?
4 covalent bonds