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WorksheetsQUIZ CHEMISTRY
Total questions: 50
Worksheet time: 25mins
Which metal is not a solid at room temperature?
Cobalt
Iron
Mercury
Sodium
They are ways to abbreviate with one or two letters the names of the elements:
Chemical symbol
Electronic configuration
Electronegativity
Mass number
The atomic number is the number of protons and electrons found in each element.
True
False
They are atoms of the same element but have different numbers of neutrons.
Compounds
Isotopes
Mixtures
Mass number
Which thinker was the first to establish the atom?
Thomson
Rutherford
Democritus
Schrödinger
What is Thomson's model colloquially called?
Plum pudding model
Theory of the Universe
Nuclear atom
Quantum model
Which thinker proposed that electrons travel as waves?
Thompson
Rutherford
Democritus
Schrödinger
Which thinker proposed that the electrons were traveling in orbits around the electrons, and that between the electrons and the nucleus there is a lot of empty space.
Thompson
Rutherford
Democritus
Schrödinger
For the electronic configuration, the order in which the letters appear is p, s, f, d (in that order).
True
False
The shape of an orbit s is spherical.
True
False
What is the chemical symbol for Tin
Sn
Sb
Sr
Ti
How many elements of period table are found naturally in the universe?
118
78
88
138
The periods on the periodic table are 18 and they are horizontal
True
False
The main characteristics of the metals are:
Not shiny
Low melting points
Good conductors of heat and electricity
Non of them
F, Cl, Br, I are examples of:
Noble gases
Transition elements
Alkaline earth metals
Halogens
They are classified: (S,P,F,D)
Block
Period
Group
Element
What is the correct order of chemical symbols of the next elements… Lead, Antimony, Phosphorus, Copper.
L, An, F, Co
L, Sb, F, CU
Pb, Sb, P, Cu
Pb, An, P, Co
… larger atomic radius?
Ca
Sc
Y
Sr
In the chemical symbols only the first letter is capitalized.
True
False
Pure substance that cannot be broken down into simpler substances by physical or chemical means.
Atom
Element
Liquid
Metal
Matter is divided into pure substance and mixed
True
False
Pure substances are divided into:
Element and compound
Homogeneous and heterogenous
Matter
Water and copper are and example of:
Homogenous mixture
Heterogenous mixture
Compound
State of matter in wich the particles are very close
Solid
Liquid
Gas
Orange juice is an example of:
Compound
Element
Mixture
The melting point is a chemical property:
True
False
The helium in a balloon is in state:
Solid
Liquid
Gas
Two inmiscible liquids with diferente density. Select the correct method to separate
Decantation
Filtration
Evaporation
What is the state of benzene at 15 °C?
Liquid
Solid
Gas
State of matter in wich it particles are very far apart
Solid
Liquid
Gas
Sciense that studies the composition, structure, propeties and changes of matter?
Biology
Math
Chemistry
Phisycs
Most common state of the matter in the universe?
Plasma
Liquid
Gas
Solid
This are phisical propeties, exept?
Color, taste and odor
Density
React whit other substance
Hardness
In phisical changes the original substance is converted into a new one?
True
False
The electrons are treated as weaves is a characteristic of the atomic model of?
Bohr
Dalton
Rutherford
Schrödinger
Characteristic of orbital diagram?
Uses backeted symbols
Electrons in orbitales are representated by arrows in boxes
Represented using noble gas notation
Includes a superscript that represents the number of electrons in the orbital
Who organizate the periodic table by increasing atomic mass?
Lavoisier
Döbereiner
Mendeléyev
Johann
Name of the group in the 7A family?
Halogens
Noble gases
Inner transition elements
Alkalin metals
Most common element in the universe?
Helium
Cooper
Iron
Hydrogen
Most common element in the Earth´s crust?
Alumnium
Oxigen
Calcium
Silicon
What is a chemical bond?
It is the force that holds two atoms together in a compound and makes them work as a unit.
Is the ability of an atom to attract electrons to itself
Chemical union of two or more different elements
Is a pure substance whose intrinsic properties differentiate it from other elements
Which of the following is not a characteristic of an ionic bond?
The attraction between positively charged metal ions and negatively charged ions.
Each atom acquires the electronic configuration of a noble gas to obtain stability
The pair of dots is replaced by a horizontal line to represent the shared electron pair.
Form crystal structures
What is a cation?
Ion that has a negative charge and comes from a negative element.
Ion with a positive electrical charge, that is, it has lost electrons.
Subatomic particle existing in the nucleus without electrical charge
It is a particle with a positive electric charge.
What is the electronegativity level of a nonpolar covalent bond?
0.5 to 1.8
0.0 to 0.4
1.9 to 3.3
0.0 to 2.3
What is the electronegativity level of an ionic bond?
0.5 to 1.8
to 0.4
1.9 to 3.3
to 2.3
The polar covalent bond has an electronegativity of 0.5 to 1.8?
True
False
Which of the following examples is a salt?
Sodium chloride
Carbon dioxide
Magnesium oxide
Marcurio
Carbon dioxide is a metallic
True
False
It is true that the electronegativity of fluorine is 4.0
True
False
The electronegativity of hydrogen is 3.0
True
False
