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Elements
PT Organization
Chemical Formulas
Chemical Bonds
Characteristics of Elements
100
This is the element with the smallest mass
What is hydrogen
100
The periodic table is organized by this
What is atomic number or number of protons
100
2H2O
What is H-4, O-2
100
When an electron is transferred between atoms this bond forms
What is ionic
100
Metals have the quality of being ductile, which means this.
What is being able to be stretched into wire
200
This element has 2 energy levels and 5 valence electrons
What is nitrogen
200
The vertical columns are numbers 1-18 and called this
What is groups or families
200
3Ac2O3
What is Ac- 6, O- 9
200
When two or more atoms share electrons this bond forms
What is covalent
200
Metals are malleable which means this
What is being able to be hammered into thin sheets
300
This element has 3 energy levels and 4 valence electrons
What is silicon
300
The horizontal rows are called this
What is periods
300
2AgCl3Cu2
What is Ag- 2, Cl- 6, Cu- 4
300
An atom that gains 2 electrons has this charge
What is -2
300
Lithium is an example of a (good or poor) conductor
What is good
400
This is the only noble gas without 8 valence electrons
What is Helium
400
Group 14 has this many valence electrons
What is 4
400
Al2(CO3)3
What is Al- 2, C- 3, O- 9
400
When sodium and chlorine bond they form an ionic bond. Sodium how has a charge of _____ and chlorine has a charge of _____.
What is Na: +1, Cl: -1
400
Elements is group 18 are unreactive for this reason
What is they have full outer shells
500
This metal is liquid at room temperature
What is Mercury (Hg)
500
Period 3 has this many energy levels
What is 3
500
2Hg3(PO4)2
What is Hg-6, P- 4, O-16
500
When two oxygen atoms bond they form this type of bond
What is a covalent bond
500
This scientist organized the elements into a table by similar characteristics.
Who is Mendeleev