The least reactive metal in the group.
lithium
The inner part of an atom that contains the proton and the neutron is called the __________.
Nucleus
These chemically combine to form an ionic bond.
metal and non-metal
How a covalent bond forms.
sharing a pair of electrons
Burns with a lilac flame when it reacts with water.
potassium
Also called table salt.
NaCl
These chemically combine to form a covalent bond.
non-metal and non-metal
The metals become _______ as you go down the group
softer
What keeps the positive and negative ion together in the bond and makes it strong.
strong electrostatic forces of attraction
The word to describe different forms of the same element eg diamon and graphite.
allotrope
Burns with an orange flame when it reacts with water.
sodium
The state of matter the compounds needs to be in to conduct electricity.
molten ionic compounds
Small simple molecules OR greenhous gases.
carbon dioxide, water or methanee
Products of the reaction of an alkali metal and water.
hydrogen gas and a metal hydroxide.
Physical properties of ionic compounds.
Usually a solid with a high melting point
How to draw atom in a covalent bond showing the shared pairs of electrons.
dot and cross diagram
Some atoms have the same number of _______ but a different number of ___________, which makes them isotope.
protons and neutrons