[Part 2]- C2- the periodic table 🧪 Flashcards
What is a specific feature about group 7 elements?
- all group 7 elements, have seven electrons in their outer shell.
Fill in the gaps: Group seven elements form _________, with two atoms which are joined by a ________ bond.
- Group seven elements form molecules, with two atoms which are joined by a covalent bond.
What are group seven called?
- group seven are called the halogens.
What happens to the melting and boiling points of group seven?
- the melting and boiling points of group seven increases as you move down the group.
What happens to the relative molecular mass of group 7?
- as you move down group seven, the relative molecular mass increases. [the molecules get bigger]
What happens to the relative molecular mass of group 7?
- as you move down group seven, the relative molecular mass increases.
Fill in the gaps: The halogens are all ___ _______.
- The halogens are all non-metals.
What do group seven elements form, when they react with other non-metal atoms ?
Hint: compound
- group seven elements form covalent compounds, when they react with other non-metal atoms.
What happens when a group seven elements reacts with a metal?
- when group seven elements react with a metal, the group seven element: gains one electron and forms a negatively charged -1 ion.
What happens to the reactivity of group seven ?
Hint: extra electron
- as you move down group seven, the reactivity of the halogens decreases
- This is because its harder to gain an extra electron, as there is a greater distance from the nucleus aswell as shielding by internal electrons.
Fill in the gaps: A more _______ halogen, can _______ a less reactive halogen from an _______ solution of its salt.
Fill in the gaps: A more reactive halogen, can displace a less reactive halogen from an aqueous solution of its salt.
Referring to relative atomic mass, what are the trends of group seven?
- group seven [the halogens] have a higher relative atomic mass.