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WorksheetsMatter and its transformations QUIZ
Total questions: 50
Worksheet time: 22mins
Is an homogeneous mixture:
Sandwich
Cereal
Salad
None of above
Select the following elements:
H
NaCI
H2O
Mg
What is an heterogeneous mixture?
A uniform composition throughout the mixture
A not uniform composition throughout the mixture
A chemical compound
None of the above
Is an heterogeneous mixture:
Chocomilk
Peanut butter
Orange juice with pulp
None of above
Select the following compounds
Iye
Salt
Baking soda
All of above
Are methods to separate heterogeneous mixtures, EXCEPT:
Centrifugation
Decantation
Evaporation
Filtration
This model is called the "_______ ______ " model because it looks like bread with raisins
(a)
They are subatomic particles with negative charge:
They are atoms of the same element but with different number of neutrons
Neutrons
Electrons
Protons
Isotopes
What was the name of the experiment that Rutherford made?
Gold Foil experiment
Plum pudding experiment
Solar system experiment
Electron cloud model
The parts of an atom are:
Subatomic particles
Orbitals
Energy levels
Persons
Element
On the heating cruve, identify the segments A,B,C,D
A: solid as temperature increase, B: melting state, C: liquid ,D: boiling state, E: gas as temperature increases
A: melting state, B:boiling state, C: solid temperature increase, D: gas temperature increase, E: Liquid
A: melting state, B: boiling state, C: solid temperature increase D: Liquid, E: gas temperature increase
Identify a chemical change:
Apple turn brown when they exposed to air
Chocolate bar starts melting
A tree is cut in pieces
Consist of atoms of two or more elements
Mixtures
Elements
Compounds
Is matter that has fixed definite composition
Matter
Pure substances
Mixtures
Is when two or more different substances are physically mixed, but not chemically
Compound
Element
Mixture
Identify a physical change:
Water vapor turns into liquid
Food is digested
Water turns into ice
Is a characteristic of a solid:
Particles move in random motion
It doesn´t have a definite shape
Has a definite volume
Is a characteristic of a gas:
Has a definite volume
The particles are not rigid
The particles has a strong force between them
James ___________ discovered the neutron
Rutherford
Miles
Chadwick
Dalton
Which of the following Pauli´s Conclusion is true?
All atoms can hold two or more elements
Each orbital can hold a maximum of two electrons
Every element is made up cations
The (a) Atomic Model is only a solid sphere
It is the smallest particle of an element:
Element
Atom
Lingot
Chip
The chemical ___________ of elements allow identify them in all the world. It is written with the first letter capital.
Names
Colors
Symbols
Forms
It represents the number of protons in an atom:
Atomic number
Atomic radius
Atomic energy
Atomic form
Which Chemical bond is form by a metal and an nonmetal?
Ionic
Polar Covalent
Metallic
Non Polar Covalent
In the __________ covalent bond the electrons are shared equally by the nuclei.
Polar
Non polar
Metallic
Which of the following options is a physical property of an ionic compound
Low hardness
Low boiling point
High melting point
None of the above
The covalent bond can be:
Ionic and Polar
Non polar and Metallic
Polar and Metallic
Polar and Non polar
What is the name of an electron that is free to move?
Delocalized electrons
Free electrons
Scattered electrons
None of the above
Indicates the relative ability of an atom to attract electrons in a chemical bond
Negative bond
Electronegativity
Electrical and thermal conductivity
Ionization energy
What is the unit of electronegativity?
(a)
Which of the following elements has a bigger electronegativity?
Ba - Barium
Mg - Magnesium
C - Carbon
O - Oxygen
Which rule states that atoms gain, lose, or share electrons to acquire a full set of eight valence electrons?
Electrons rule
Atom rule
Octet rule
Eight rule
Bases always have to end with____.
OH
H
O
HO
What is an cation?
Ion with positive charge and a nonmetal
Ion with negative charge and a nonmetal
Ion with positive charge and a metal
Ion with negative charge and a metal
How do you call a chemical compound form by three different elements.
Binary
Multiple
Polyatomic
Ternary
What are the main characteristics of metals?
Metallic appearance, but they are brittle and only fair conductors of electricity
Aren't shiny and they don't conduct heat or electricity well
Lustrous, malleable, ductile, good conductors of heat and electricity
None of the above
What are the main characteristics of metalloids?
Metallic appearance, but they are brittle and only fair conductors of electricity
Aren't shiny and they don't conduct heat or electricity well
Lustrous, malleable, ductile, good conductors of heat and electricity
None of the above
What are the main characteristics of nonmetals?
Metallic appearance, but they are brittle and only fair conductors of electricity
Aren't shiny and they don't conduct heat or electricity well
Lustrous, malleable, ductile, good conductors of heat and electricity
None of the above
What is the symbol for Sodium?
CI
Li
S
Na
What is the symbol for Potassium?
P
Rb
K
Cr
What is the symbol for Vanadium?
Ar
V
Lv
Og
What is the symbol for Meitnerium?
O
Mt
M
Bh
All matter is composed of elements, of which there are _____ different kinds in total. Of these, only ____ elements occur naturally and make up all the substances in the universe.
110, 80
118, 88
Chemical symbols are...
...one or two letter abbreviations for the names of the elements.
...the measure of its combining capacity with other atoms when it forms chemical compounds or molecules.
These are examples of nonmetals:
B, Si, Ge, As, Sb
Na, K, Rb, Li, Cs
H, C, N, O, CI
These are examples of metals:
B, Si, Ge, As, Sb
Na, K, Rb, Li, Cs
H, C, N, O, CI
These are examples of metalloids:
B, Si, Ge, As, Sb
Na, K, Rb, Li, Cs
H, C, N, O, CI
Which one has a higher first ionization energy?
Na
K
