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Total questions: 50
Worksheet time: 25mins
The bond formed by the electrostatic attraction of cations and anions:
Ionic
hydrogen
Metal
covalent
The substance is
:
In iron
A glass
Nail
envelope.
An atom is
:
electrically neutral particle that consists of positively charged nucleus and negatively charged electrons;
one of the types of matter that is characterized by a rest mass;
a separate electroneutral particle formed when covalent bonds occur between the atoms of one or more elements, which determines the chemical properties of a substance;
the totality of chemical elements and or atomic groupings that make up this chemical.
Under the diagonal 5-85 in the Periodic system of chemical elements of D. I. Mendeleev are:
Metals
amphoteric compounds;
Non-metals
Noble gases
Select the formula for aluminum nitrate
:
AI(NO3)3
H2SO4
CuO
NaCI
The anion is:
N3-
H+
CO
Na+
The substance is
:
One of the types of matter that is characterized by a rest mass;
electrically neutral particle that consists of positively charged nucleus and negatively charged electrons;
a separate electroneutral particle formed when covalent bonds occur between the atoms of one or more elements, which determines the chemical properties of a substance;
the totality of chemical elements and or atomic groupings that make up this chemical.
In which compound is the covalent bond between atoms formed by the donor-acceptor mechanism:
NH4CI
KCI
CCI4
CaCI2
The emulsion is
Milk
Foam
In jelly
Fog
Formula of the substance formed by a metal bon
d
CA
O3
S8
C
Maximum number of electrons in s-orbitals:
2
6
10
14
Orbitals that have a spherical shape are:
s-orbitals;
p-orbitals;
d-orbitals;
f-orbitals.
The amount of substance is...
a physical quantity characterized by the number of structural particles contained in a given system
the smallest particle of a substance that has its basic properties and is capable of independent existence;
the smallest particle of a chemical element that has the same charge of the nucleus and has its inherent chemical properties;
the amount of substance in the system that contains as many structural units (atoms, molecules) as the number of atoms contained in 0.012 kg of carbon -12
A hydrogen molecule is:
simple substance;
the physical body;
a complex substance;
chemical element.
H2SO4 solution will interact wit
h
CuO
Na2SO4
Hg
HNO3
The solution of sulfuric acid reacts with each of the two substances:
Zn and CuO;
Mg and HCl;
Cu(OH) 2 and N2;
BaCl2 and H2;
Dibasic and oxygen-containing acid i
s
sulphuric
hydrogen chloride
hydrogen sulfide;
phosphoric.
All the acids capable o
f
interact with the main oxides;
to change the color of phenolphthalein;
decompose when heated;
it is well soluble in water.
A homogeneous system consisting of two or more substances:
solution
dispersion system;
colloidal solution;
suspension.
The number of electrons that can be located on one orbital:
2
1
3
4
Electrically neutral particle that consists of positively charged nucleus and negatively charged electrons is:
In atom
A molecule
chemical element.
Ion
NaCl is:
a complex substance;
simple substance;
Atom
Metal
The molar mass of a substance is denoted by:
M
n
Vm
Mr
Select the formula for the alkaline earth metal
Ba
Na
AI
CI
The cation is:
H+
N3-
CO
VG-
Complex substances consist of:
from 2 or more chemical elements;
from 1 chemical element;
from protons, neutrons, and electrons;
there is no correct answer
The substances formed by joining identical atoms, the chemical bond:
covalent non-polar
covalent polar;
Ion
hydrogen;
The similarity of suspensions and emulsions is that:
all answers are correct.
it is a heterogeneous system;
particles are visible to the naked eye;
they are easily deposited;
The concept of "molecule" is not applicable to any structural unit of a substance:
diamond;
Oxygen
Water
hydrogen.
Determine the element with the electron distribution scheme in atom 2, 8, 8:
Ar
Na
P
AI
The maximum number of electrons at the third energy level:
18
14
8
24
Select which of the following salts is soluble:
Na2SiO3.
Ag2CO3;
Zn3 (PO4)2;
MgSiO3;
Atom is...
the smallest particle of a chemical element that has the same charge of the nucleus and has its own chemical properties;
the smallest particle of a substance that has its basic properties and is capable of independent existence;
a physical quantity characterized by the number of structural particles contained in a given system;
the amount of the system substance that contains as many structural units (atoms, molecules) as there are atoms in 0.012 kg of carbon -12.
The substance consists of molecules:
Water
Hydrogen
Diamond
In sand
Which of the following salts is soluble:
NaCl.
Fe3 (PO4)2;
CaCO3;
MgSiO3;
With a solution of hydrochloric acid interacts:
zinc hydroxide;
mercury;
carbon monoxide (II);
barium sulfate.
Color of litmus in acidic medium:
Red
colorless;
crimson;
Blue
The general property of alkalis is not:
decomposition by heating;
changing the color of indicators;
interaction with acid oxides;
interaction with acids.
Water, which is considered the most clean
Distilled
Spring
Sea
Tap water
The elementary particles that make up energy level
s
electrons
protons;
protons and neutrons;
neutrons;
A set of atoms with the same nuclear charge is
:
chemical element;
Atom
simple substance;
a complex substance.
Chemistry is
:
the science of the composition, structure, properties and transformations of substances;
the science of irreversible changes in matter;
the science of reversible changes in matter;
the science of life on Earth.
With very large periods are
:
6;7
1-6
4;5
1;2;3
Select the nonmetal formula:
C
Na
Ba
AI
Metal is
:
Na
CI
O
H
The atom consists of:
protons, neutrons, and electrons;
protons
protons and neutrons;
protons and electrons.
The biological gel is:
Cartilage
Air
Clouds
river water
A bond can be formed between atoms with sharply different electronegativity:
Ionic
covalent polar;
covalent non-polor
Metal
The maximum number of electrons in fourth energy level
32
14
26
18
Determine the element with the electron distribution scheme in atom 2, 8, 4:
Si
Mg
CI
S
