Flashcards
Elements - Flashcards
Flashcards do conjunto (20)
- 1What are atoms?They are the building blocks that make up every substance.
- 2What are elements?They are substances made of only one element.
- 3What are properties?THEy are a unique set of characteristics that identify the substance.
- 4What are the two types of groups elements can be broadly classified into?Metallic and non-metallic
- 5What are some examples of metallic elements?Aluminium, iron, mercury, gold and silver.
- 6What are some properties of metals?- They are shiny
- Good conductors of heat and electricity
- Can be bent and hammered into sheets
- Can be stretched into wires - 7What is the only non-metal that is liquid at room temperature?Bromine
- 8What are some properties of non-metals?- They are dull
- Do not conduct heat or electricity
- Break or crumble when you bend them - 9HOw are ash and charcoal formed?By burning a piece of paper or wood.
- 10How many known elements are there?118
- 11And how many of those known elements occur naturally?Only 91.
- 12What are the different ways atoms can be arranged inside an element?They can exist as;
- Single atoms
- Clusters of atoms
- Grid-like structures - 13What are some examples of physical properties?- If the element is a solid, gas or liquid
- How well it conducts heat or electricity
- Can it bend
- Does it break is a force is applied to it? - 14What is monatomic?An element that consists of just single atoms.
- 15How many monatomic elements are there out of the naturally occurring ones?Only 6.
- 16What is the name for the clusters if two or more atoms bonded together inside an element?Molecular.
- 17Why is carbon considered to be unique?Because it can form very large molecules of almost anything.
- 18What is the percentage of the known elements that are metal?80%.
- 19What are crystal lattices?A grid-like structure of atoms.
- 20In metal lattices, is the atoms bond weak or strong?Weak. That's why they can be hammered and bent into whatever shape.
Informações
- Descrição
- Basically a brief of eleMENTS
- Criado por
- Rawan Ibrahim
- Visualizações
- 36
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