Unit 3: Peridoc Table
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (24 张)
Periodic table definition
A table/ chart that displays information about all the known chemical elements
Element
A pure substance that cannot be broken down into a simpler substance by any means (on the periodic table)
What scientist organized the periodic table?
Dmitri Mendeleev
How many groups are in the periodic table?
18
What is another way to say groups
Chemical families
T or F: The groups/chemical families are in 18 rows
False: the groups/chemical families are in 18 columns
How many periods are in the periodic table
7
True or false: Periods are in 7 rows
Trill
What are the 4 ways the periodic table is organized in?
• It is divided into metals, non-metals, and metalloids • It is organized into 7 rows which are called periods • It is divided into 18 columns which are called groups or chemical families • It is organized in order of atomic numbers
What are metals
An element that is lustrous, malleable, ductile, and conducts heat and electricity
Where are metals found on the periodic table
Found on the left and Central parts of the periodic table (found on the left of the staircase/amphoteric line)
What is a non-metal
Usually a gas or a dull, powdery solid that is not malleable or ductile and does not conduct heat or electricity
Where are non-metals found on the periodic table
Found on the right side of the periodic table (Found on the right of the staircase/amphoteric line)
What are metalloids
An element that has properties of both metals and non-metals
Where are Metaloids found in the periodic table
They are located along the staircase on the periodic table
What are periods on the periodic table
They are 7 horizontal rows
What are groups/chemical families in the periodic table
They are 18 different vertical rows
What are the different groups/chemical families
Group 1: alkali metals Group 2: alkaline earth metals Group 3-12: Transition metals Group 17: hallogens Group 18: Noble gases
What are alkali metals
The first group That is highly reactive but has low densities
What are alkaline earth metals
The 2nd group That is not as highly reactive as alkali metals
What are halogens
The second last group that is radioactive and often forms compounds with alkali metals
What are noble gases
The last Group That are colourless, odourless, and tasteless, but they Glow brightly when an electrical current passes through them
What are the first 20 elements of the periodic table in order
Hydrogen helium lithium barillium boron carbon nitrogen Oxygen florine Neon sodium magnesium Aluminum silicon Phosphorus sulphur Chlorine argon potassium calcium
What is the symbol of the first 20 elements in order
H He Li Be B N O F Ne Na MG Al Si P S Cl Ar K Ca