science

1) When an alkali metal is involved in a chemical reaction with a nonmetal, what charge will its atoms most likely form?

1-
2+
1+
2-
2) Which properties increase when moving down a group of the periodic table?

Select all that apply.

reactivity
valence electrons
atomic radii
atomic mass
3) Which option describes a common property of the elements, nitrogen (N), phosphorus (P), arsenic (As)?
Hint: Review your periodic table.

They have the same number of valence electrons.
They have the same atomic radius size.
They have the same amount of reactivity.
They have the same amount of atomic mass.
4) Which option correctly orders the elements by increasing reactivity?
Hint: Review your periodic table.

Na < K < Li
K < Na < Li
Li < Na < K
Na < Li < K
5) An atom of lithium (Li) and an atom of chlorine (Cl) engage in a chemical reaction.

Which correctly describes the structure of the resulting chemical compound?
Hint: Consider the class of each element.

The chemical compound will have a ball-and-stick structure.
The chemical compound will have a network structure.
The chemical compound will have double bonds.
The chemical compound will have triple bonds.
6) Which ionic compound contains a 2+ and 2− ion?

Select all that apply.

KCl
NaF
CaS
MgO
7) Examine the false statement.

The alkali earth metals have five valence electrons.

Select the rewording of the statement that is true.

The alkali metals have five valence electrons.
The halogens have five valence electrons.
The alkali earth metals have two valence electrons.
The alkali earth metals have one valence electron.
8) When an element in the oxygen family is involved in a chemical reaction with a metal, what charge will its atoms most likely form?

1-
2+
2-
1+
9) Examine the incomplete analogy.

wind : swirls :: chemical bond : _[blank]_.

Which option best completes the analogy?


flashes
stretches
skips
jumps
10) Which molecular formula is written incorrectly?

N2
Br4Si
CO
CH4
11) Which options correctly describe similarities between the elements boron (B), aluminum (Al), and gallium (Ga)?
Select all that apply.
Hint: Review your periodic table.

All three elements tend to form ionic compounds that cannot be dissolved in water.
All three elements have five valence electrons.
All three elements tend to form 3+ cations when reacting with metals.
All three elements are part of the boron family.
12) Which statement about atoms of elements in the same group of the periodic table is true?

They share similar chemical properties and the same number of valence electrons.
They share the same number of energy levels and the same amount of reactivity.
They share the same number of protons and the same mass.
They share the same number of electrons and the same atomic radius size.
13) Examine the image.

A letter C, representing carbon, surrounded by a circle, representing an atom on the top, bottom, left, and right of the C.

Given the image, how many covalent bonds can one atom of carbon form?

4
3
1
2
14) Which options correctly describe characteristics of noble gases?
Select all that apply.

All noble gases easily react with other elements.
All noble gases have valence shells with 8 electrons.
All noble gases have a unique atomic fingerprint.
All noble gases emit pink light when electrified.
15) Mei-Ling is given the task of studying the compound calcium bromide.

Before she even begins her research, what information can Mei-Ling obtain from the compound's chemical name alone?
Select all that apply.

She can tell the compound has at least one positively charged calcium atom and one negatively charged bromine atom.
She can tell the compound has at least one negatively charged calcium atom and one positively charged bromine atom.
She can tell that the compound forms networks.
She can tell that the compound forms molecules.
16) Given that bromine (Br) is a halogen, what can be inferred as true about bromine?
Hint: Review your periodic table.

Bromine has seven electrons and seven protons.
Bromine does not react easily with other atoms.
Bromine tends to form anions when in chemical reactions with metals.
Bromine tends to form covalent bonds when in chemical reactions with metals.
17) What is a property of an ionic compound?

Select all that apply.

conducts electricity and heat efficiently
insulates against heat and electricity
resists melting at high temperatures
remains intact when soaked in water
18) Trey and his friends are walking home when they get caught in a thunderstorm. They decide to find shelter to get away from the rain and lightning. After looking around, they see two places they can go: a wooden gazebo or an aluminum shed. Trey has studied physical science and tells his friends they should stand under the wooden gazebo.

Which best describes why Trey and his friends should go to the gazebo to be safe from the thunderstorm?

If enough rain falls on the shed, the aluminum's free-floating electrons will lose their charge and attract lightning to strike the shed.
If enough rain falls on the shed, the aluminum's property of tarnishing easily could cause the shed's door to be sealed shut.
If lightning strikes the shed, the aluminum's property of fracturing easily under pressure could cause the shed to collapse.
If lightning strikes the shed, the aluminum's free-floating electrons could easily conduct the electricity throughout the shed.
19) According to the octet rule, what is true about the reactivity of halogens?

A halogen atom has seven electrons in its valence shell, so halogens are very reactive.
A halogen atom has two electrons in its valence shell, so halogens are very unreactive.
A halogen atom has two electrons in its valence shell, so halogens are very reactive.
A halogen atom has seven electrons in its valence shell, so halogens are very unreactive.
20) Which statements about the periodic table's organization are true?
Select all that apply.

The periodic table is organized by families.
The periodic table​ is organized by reactivity.
The periodic table is organized by periods and groups.
The periodic table​ is organized by atomic number.
The periodic table is organized by atomic mass.
21) Which compounds are most likely to have covalent bonds?
Select all that apply.
Hint: Review your periodic table.

MgO
NaF
H2O
CO
22) How has the discovery and usage of the periodic table benefited society?
Select all that apply.

It has enabled scientists to communicate chemical discoveries and results more easily.
It has increased scientists' ability to determine how cations and anions form covalent bonds.
It has increased scientists' ability to predict and discover new elements.
It has led to increased knowledge and usage of elements in technological innovations.
23)What is the chemical name and formula of a compound that has one carbon atom and four chlorine atoms?

chlorine carbide; Cl4C
monocarbon tetrachloride; CCl4
carbon tetrachloride; CCl4
carbon chloride; Cl4C
24) Which option describes nonmetals?

They are used to make machinery.
They conduct heat efficiently.
They are good for making into wires.
They conduct electricity poorly.
25) Which compounds are most likely to have ionic bonds?
Select all that apply.
Hint: Review your periodic table.

CO
MgO
H2O
NaF
26) Which elements have atoms that are likely to form an anion?
Select all that apply.
Hint: Review your periodic table.

phosphorus (P)
chlorine (Cl)
selenium (Se)
magnesium (Mg)
27) Tristan is given the task of studying the compound CO2.

Before he even begins his research, what information can Tristan obtain from the compound's chemical formula alone?

Select all that apply.

He can tell the compound contains one atom of carbon and two atoms of oxygen.
He can tell that the compound forms molecules.
He can tell the compound has two atoms of carbon and two atoms of oxygen.
He can tell that the compound forms networks.
28) The alkali earth metal beryllium (Be) engages in a chemical reaction and loses all of its valence electrons.

What charge does beryllium have after the chemical reaction?

6-
2+
6+
2-

  1. 👍 0
  2. 👎 0
  3. 👁 2,658
  1. 1) When an alkali metal is involved in a chemical reaction with a nonmetal, what charge will its atoms most likely form?

    1-
    2+
    1+
    2-

    correct answer is 1+

    1. 👍 1
    2. 👎 0
  2. Which properties increase when moving down a group of the periodic table?

    Select all that apply.

    correct answer
    atomic mass

    1. 👍 0
    2. 👎 0
  3. 3) Which option describes a common property of the elements, nitrogen (N), phosphorus (P), arsenic (As)?
    Hint: Review your periodic table.

    correct answer
    They have the same number of valence electrons.

    1. 👍 0
    2. 👎 0
  4. 4) Which option correctly orders the elements by increasing reactivity?
    Hint: Review your periodic table.

    Na < K < Li
    K < Na < Li
    Li < Na < K
    Na < Li < K

    correct answer
    Li < Na < K

    1. 👍 0
    2. 👎 0
  5. 5) An atom of lithium (Li) and an atom of chlorine (Cl) engage in a chemical reaction.

    Which correctly describes the structure of the resulting chemical compound?
    Hint: Consider the class of each element.

    correct answer
    The chemical compound will have a network structure.

    1. 👍 1
    2. 👎 0
  6. 6) Which ionic compound contains a 2+ and 2− ion?

    Select all that apply.

    KCl
    NaF
    CaS
    MgO

    correct answer
    MgO
    CaS

    1. 👍 0
    2. 👎 0
  7. 7) Examine the false statement.

    The alkali earth metals have five valence electrons.

    Select the rewording of the statement that is true.

    The alkali metals have five valence electrons.
    The halogens have five valence electrons.
    The alkali earth metals have two valence electrons.
    The alkali earth metals have one valence electron.

    correct answer
    The alkali earth metals have two valence electrons.

    1. 👍 1
    2. 👎 0
  8. 9) Examine the incomplete analogy.

    wind : swirls :: chemical bond : _[blank]_.

    Which option best completes the analogy?

    flashes
    stretches
    skips
    jumps

    Correct Answer: I got stretches and it was correct.

    1. 👍 0
    2. 👎 0

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