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Elements & the Periodic Table Flashcards | StudBud
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Elements & the Periodic Table
Elements & the Periodic Table
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review of elements and periodic table structure #periodictable
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1
Which particles in atoms have a negative electric charge?
neutrons
protons
electrons
nucleus
2
Mendeleev created the first periodic table by arranging the elements in order of _____.
decreasing atomic mass
increasing atomic number
increasing atomic mass
increasing melting points and densities
3
How does the atomic mass of the elements change as you move from top to bottom on the table?
Mass decreases
Stays the same
Mass increases
4
The elements that do not ordinarily form compounds are ______.
metals
noble gases
halogens
elements in the carbon family
5
What information in the periodic table indicates the number of protons in an atom?
the element's atomic number
the element's atomic mass
the element's chemical symbol
the position of the element in the column
6
How does the reactivity of elements change as you move from left to right on the table?
Doesn't change
Decreases reactivity
Increases Reactivity
7
In an atom, the number of protons equals the number of ____.
electrons
nuclei
neutrons
isotopes
8
What natural event provides enough energy to create elements through nuclear fusion?
a particle accelerator
a plasma
a nebula
a supernova
9
What is an isotope?
an atom with a different number of protons than its neutrons
an atom with a different number of electrons than protons
an atom with different numbers of neutrons and electrons
an atom with a different number of neutrons than its protons
10
In the periodic table, the most reactive elements are found in _____.
Groups 13-16 in the center
Group 1, the first column on left
Periods 6 & 7 at the bottom
Period 1, the first row on the top
11
Sodium has 11 protons, 12 neutrons and 11 electrons. What is it's atomic number?
11
12
22
23
12
If an atom has 15 electrons, how many protons will it have?
0
30
15
20
13
The sun is made of mostly what element?
oxygen
carbon
hydrogen
iron
14
Which of the following scientists inferred that an atom's positive charge is in the nucleus?
John Dalton
Ernest Rutherford
Niels Bohr
J.J. Thompson
15
In an atom, the number of protons equals the number of ____.
isotopes
neutrons
electrons
nuclei
16
Elements that have higher electronegativity have the following characteristics-
Have low ionization energy
Cannot hold onto their electrons
Have a tendency to steal electrons
Tend to be metals
17
Sodium has 11 protons, 12 neutrons and 11 electrons. What is it's mass number?
23
12
11
22
18
How did chemists change Mendeleev's periodic table?
The used atomic number instead of atomic mass.
The included chemical properties like bonding power.
They included physical properties like density.
They used atomic mass instead of atomic number.
19
The elements in a column of the periodic table ____.
are in the same period
have the same atomic mass
have similar chemical symbols
Have the Same number of Valence Electrons
20
What is unique about noble gases?
form salts
Don't form compounds
exist as solid elements
Are non-reactive
