C3.1.1 - Formulae Of Elements And Molecules Flashcards Preview

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Flashcards in C3.1.1 - Formulae Of Elements And Molecules Deck (9)
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1

What does the Periodic Table show you?

The names of elements, the chemical symbols for their atoms, their atomic number and their relative atomic mass

2

Describe how you would write a chemical symbol?

Each chemical symbol has 1, 2, or 3 letters, and starts with a capital letter and is followed with letters in lowercase

3

Why are the formulae for metal elements always written as empirical formulae?

As they are giant metallic lattices, which means the number of atoms would be immense

4

What are diatomic molecules?

The non-metal elements in Group 7(IUPAC Group 17) which are attracted together due to intermolecular forces

5

What does a diatomic molecule contain?

2 atoms covalently bonded together (having a subscipt 2)

6

What diatomic molecules do not have are not in Group 7?

Hydrogen, nitrogen and oxygen

7

What is the empirical formula for sulfur?

S8

8

What is the empirical formula for phosphurus?

P4

9

What does the molecular formula for a simple covalent compound show?

The symbols for each element it contains and the number of atoms of each element in one of its molecules