3.1-3.7: Atoms, Elements and Compounds 

________ are mixtures of metals, where the metals are mixed together but are not chemically combined.

A(n) ________ made up of two or more elements chemically combined.

________ has 1 proton, helium has 2 protons, lithium has 3, etc.

________ is not disrupted as the outer electrons do not belong to any particular metal atom so the delocalised electrons will move with them.

________ can be separated by physical methods such as filtration or evaporation.

________ orbit the nucleus in shells (or energy levels) and each shell has a different amount of energy associated with it.

________= All of the ________ are unreactive as they have full outer shells and are thus very stable.

Eg: sand and water, oil and water, sulphur ________ and iron filings 😁.

________ have high melting and boiling points.

The difference in mass affects the ________, such as density, boiling point and melting point.

________ are made of tiny particles of matter called atoms.

They can be hammered and bent into ________ or drawn into wires without breaking.

________ have a lot of use in the medical field.

________ are the smallest particles of matter, that we can not break down further by chemical means.

Group: The final notation, which is 7 in the example, shows that a(n) ________ has 7 outer electrons.

Chlorine is a(n) ________ non- metal so will need to gain an electron to have a full outer shell of electrons.

________ (radioisotopes) are unstable due to the imbalance of neutrons and protons, which causes the nucleus to decay over time through nuclear fission and emit radiation.

A(n) ________ with the charge 1+ is formed.

________ are formed when metal atoms react with non- metal atoms.

________ are stable atoms which really only.

The ________ and mass number for every element is on the Periodic Table.

________: In ________, the atoms are arranged in an orderedand repeating fashion.

The oppositely charged ions are held together by ________.

________ happen between metals and non metals.

________ are atoms of the same element that contain the same number of protonsand electrons but a different number of neutrons.

________ is a Group I metal so will lose one outer electron to another atom to gain a full outer shell of electrons.

________ are thus not broken and as a result metals are strong but flexible.

________ contain atoms of different sizes, which distorts the regular arrangements of atoms.

The nucleon number minus the proton number gives you the number of neutrons of an atom

Copper sulfate and calcium carbonate 👍🏼

sand and water, oil and water, sulphur powder and iron filings 😁

using diagrams called electron shell diagrams or by writing out a special notation called the electronicstructure

The red numbers at the bottom show the number of notations which is 3, showing that a chlorine atom has 3 shells of electrons

The final notation, which is 7 in the example, shows that a chlorine atom has 7 outer electrons

VIII and in rows called Periods

all metals can lose electrons to other atoms to become positively charged ions

all non-metals can gain electrons from other atoms to become negatively charged ions

NaCl

In lattice structures, the atoms are arranged in an orderedand repeating fashion