What is true about the position of all metals in the periodic table?

They are to the left of the zigzag line.

Which of the following occurs when substances undergo chemical changes?

Bonds between atoms are broken and new bonds are formed.

In which situation would a sphere model of atoms be most useful?

representing atoms in a substance in the human body

Sodium (Na) readily forms bonds with other atoms. Which statement best explains this property?

Sodium atoms need to give only 1 electron to become stable

Which property should a student expect to observe in an ionic compound?

The compound should conduct electricity when placed in water

How would you arrange the dots that represent electrons in a Bohr model of carbon?

They would be rings around the nucleus.

Which property makes metals good conductors of electricity?

The electrons in a metal can move freely.

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Unit 3: Atoms and the Periodic Table

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Questions 20

Answers

1
What is true about the position of all metals in the periodic table?
They are in the rightmost column.
They are in the first group.
They are in the bottom period.
They are to the left of the zigzag line.
2
Which term best describe a unit of carbon dioxide?
mixture
molecule
element
ion
3
Which of the following occurs when substances undergo chemical changes?
Atoms change from one element into another element.
Old atoms are destroyed and new atoms are formed.
Bonds between atoms are broken and new bonds are formed.
Atoms change in shape and size to form new substances.
4
Which of the following does each box represent on a periodic table?
a period
an element
a compound
a group
5
Which describes how elements are arranged in the periodic table?
by increasing atomic mass
by alphabetical order of name
by increasing atomic number
by chemical symbol
6
In which situation would a sphere model of atoms be most useful?
representing charged particles that make up individual atoms
representing the relationship between electrons & nucleus
representing atoms in a substance in the human body
representing the energy levels in which electrons are found
7
Which element has the average atomic mass of 87.62
Sc
Rb
Sr
Y
8
Sodium (Na) readily forms bonds with other atoms. Which statement best explains this property?
Sodium boils at a higher temperature than water.
Sodium atoms have a lower atomic # than most other elements
Sodium atoms need to give only 1 electron to become stable
Sodium atoms have an unequal number of protons and neutrons.
9
Which particle is not in the nucleus?
electron
proton
atom
neutron
10
The prefix semi- means "partly." Which kind of atom is most likely used to make semiconductors?
liquids
metals
metalloids
nonmetals
11
What is the smallest particle of calcium that has all the chemical properties of calcium?
a proton from a calcium atom
an electron from a calcium atom
a molecule that contains calcium
an atom of calcium
12
Which property should a student expect to observe in an ionic compound?
The compound should be a gas at room temperature.
The compound should not dissolve when placed in water.
The compound should conduct electricity when placed in water
The compound should have low melting and boiling points.
13
Which of the following scientists added negatively-charged particles to the model of the atom?
Ernest Rutherford
John Dalton
Niels Bohr
J.J. Thompson
14
What do a wooden chair and a balloon have in common?
Both are made of the same number of atoms.
Both are made of atoms.
Both have the same mass number.
Both are made of the same kind of atom.
15
Which of the following occurs when a sodium atoms forms a positively charged sodium ion?
The atom gains one electron.
The atom loses one electron.
The atom loses one proton.
The atom gains one proton.
16
Each atom of sulfur (S) has 6 valence electrons. Which element also has 6 valence electrons?
phosphorus (P)
oxygen (O)
chlorine (Cl)
bromine (Br)
17
How would you arrange the dots that represent electrons in a Bohr model of carbon?
They would be located in a central nucleus.
They would be rings around the nucleus.
They would be embedded in a solid core.
They would be spread evenly in the shape of a cloud.
18
Between which of these pairs of elements is a covalent bond most likely to form?
carbon and flourine
sodium and chlorine
potassium and calcium
magnesium and oxygen
19
An atom's mass number is 210 and its atomic number is 85. How many neutrons does it have?
210
125
295
85
20
Which property makes metals good conductors of electricity?
The electrons in a metal can move freely.
The positively charged metal ions attract free electrons
The electrons are shared equally by all the atoms in metal
The negative charge of the electrons cancels the positive

Unit 3: Atoms and the Periodic Table Flashcards | StudBud