Quick Answer: What Happens As You Go Down Group 7?

What happens as you go down Group 1?

The reactivity of group 1 elements increases as you go down the group because: the atoms become larger.

the outer electron becomes further from the nucleus.

the force of attraction between the nucleus and the outer electron decreases..

Does reactivity increase or decrease down a group?

Reactivity Trends Metal reactivity increases down a group because as nuclear shielding increases and the nucleus’ hold on the valence electron weakens, therefore it is easier to remove valence electrons.

Why are boiling points of Group 4 hydrides lower than hydrides of Group 5/6 and 7?

All the group 4 hydrides have a regular tetrahedral shape and are non-polar. … The only intermolecular forces between such molecules are weak van der Waals’ forces. These generally increase with increasing relative molecular mass.

Are Group 7 elements toxic?

The halogens are all coloured non–metallic elements and the colour gets darker down Group 7 (see data table) and diagram above. At room temperature … Chlorine a dense pale green gas, highly reactive and very toxic (used in WWI).

Why do elements in Group 1 react violently with Group 7?

Elements react by gaining or losing electrons. … Group 1 elements get more reactive down the group becasue with each step down the group the number of full electron rings increases by 1 and the outermost electron is further away from the positive nucleus.

Why Fluorine is the most reactive element in Group 7?

Fluorine is the most reactive element in Group 7, and is even more reactive than chlorine. … Fluorine’s outer shell is closer to the nucleus and has fewer filled shells between it and the nucleus, so the attraction for a new electron is greater and so it can gain an extra electron more easily.

Do all group 1 elements react vigorously with water?

This page looks at the reactions of the Group 1 elements – lithium, sodium, potassium, rubidium and caesium – with water. It uses these reactions to explore the trend in reactivity in Group 1. All of these metals react vigorously or even explosively with cold water.

Why does density increase down Group 1?

The densities of the Group 1 elements increase down the group (except for a downward fluctuation at potassium). This trend is shown in the figure below: … Atomic radius increases down a group, so the volume of the atoms also increases. Fewer sodium atoms than lithium atoms, therefore, can be packed into a given volume.

What happens when Group 1 and Group 7 elements react together?

The group 7 elements react vigorously with group 1 elements such as sodium and potassium. In each case, a metal halide is formed (fluoride, chloride, bromide or iodide). The table summarises the names and formulae for the metal halides formed by the reaction of group 1 elements with group 7 elements.

Why does boiling point increase down Group 7?

The boiling and melting points increase as you go down the group. This is because the strength of the Van Der Waals forces (or induced dipole-dipole interactions) increases since the atoms have more electrons as you descend the group. … Volatility decreases down the group as the boiling points increase.

What is Group 0 called?

The elements in group 0 are called the noble gases . They exist as single atoms .

What is the reactivity in Group 7?

The non-metal elements in Group 7 – known as the halogens – get less reactive as you go down the group. This is the opposite trend to that seen in the alkali metals in Group 1 of the periodic table . Fluorine is the most reactive element of all in Group 7.

Why does density increase down the group?

First group elements are generally the largest. Larger the size larger is the density because there is large increase in mass with considerable increases in volume. Hence density increases down a group as size increase down the group. … Atomic radius increases down a group, so the volume of the atoms also increases.

Does reactivity increase down Group 7?

The reactivity of Group 7 elements decreases down the group. Non-metal atoms gain electrons when they react with metals. … The electrons in the outer shell move further away from the nucleus as we go down the group and the attraction force between the electrons and the nucleus become weaker and weaker.

Why do melting and boiling points decrease down Group 1?

When any of the Group 1 metals is melted, the metallic bond is weakened enough for the atoms to move more freely, and is broken completely when the boiling point is reached. The decrease in melting and boiling points reflects the decrease in the strength of each metallic bond.

Why is Cl more reactive than Br?

Although the bromine nucleus is more positively charged than the chlorine nucleus, the increase in the radius and the extra shielding in the bromine atom outweigh this factor, which means that an electron is more easily attracted into the outer shell of a chlorine atom than that of a bromine atom, so chlorine is more …

Why are Group 7 called halogens?

The Group 7 elements are called the halogens. They are placed in the vertical column, second from the right, in the periodic table . … Group 7 elements form salts when they react with metals. The term ‘halogen’ means ‘salt former’.

What happens to the melting point as you go down Group 7?

The melting points and boiling points of the halogens increase going down group 7. This is because, going down group 7: the molecules become larger. the intermolecular forces become stronger.

Why do Group 7 elements become less reactive as you go down the group?

Since they are non-metals, they can also share electrons with other non-metals to form molecules. … They become less reactive as you go down the group because the outer electrons are progressively further away from the nucleus so it is harder for the nucleus to attract in the extra electron required for stability.

Why does density increase down Group 7?

So as you go down the group 7A and element in the halogen family would have the same volume, the atomic mass increases. Density is mass divided by volume, so this causes the density to. The number of valence electrons increases due to the increase in energy levels as the elements progress down the group.

Which group 7 element is a liquid for the greatest temperature range?

BromineThe halogens exist, at room temperature, in all three states of matter: Solid- Iodine, Astatine. Liquid- Bromine.