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PhySci 101

Total questions: 50

Worksheet time: 53mins

Name
Class
Date
1.

Which process involves the formation of light elements?

a)

nucleosynthesis

b)

stellar nucleosynthesis

c)

big bang nucleosynthesis

d)

both A&B

2.

Which element is first synthesized in the universe seconds after big bang?

a)

Be

b)

H

c)

He

d)

Li

3.

Which of the following is the most accepted theory about the formation of the universe that explains why it continues to expand?

a)

Steady State Theory

b)

Big Bang Theory

c)

Divine Creation Theory

d)

Oscillating Theory

4.

Which particles are involved in the formation of a chemical bond?

a)

protons in the nucleus

b)

neutrons in the nucleus

c)

electrons in the innermost shell

d)

electrons in the outermost shell

5.

Which element is the lightest and at the same time the most abundant in outer space?

a)

Iron

b)

Helium

c)

Lithium

d)

Hydrogen

6.

How does a chlorine ion differ from a chlorine atom? Chlorine ion ________ than the chlorine atom.

a)

is more stable

b)

has more electrons

c)

has more protons

d)

all of the above

7.

Which of the following are light elements formed in the Big Bang Nucleosynthesis?

a)

Hydrogen, helium, lithium, and beryllium

b)

Carbon, oxygen, nitrogen, and iron

c)

Gold, silver, uranium, and platinum

d)

Neon, argon, krypton, and xenon

8.

Which of the following describes an isotope? Atoms with ___________________

a)

the same atomic mass but different numbers of electrons.

b)

the same number of protons but different numbers of neutrons.

c)

different atomic numbers but the same atomic mass.

d)

no neutrons in the nucleus.

9.

Sophia is explaining to her classmates that an atom's identity can change if its neutron counts changes. Is her explanation correct? Why or why not?

a)

Yes, because changing the neutron count alters the atomic mass, which determines the atom's identity.

b)

No, because only the proton count determines an atom's identity, not the neutrons.

c)

Yes, because isotopes have different identities when their neutron count changes.

d)

No, because atoms are identified by their number of electrons, not neutrons.

10.

What is the primary element that fuses to form helium in the proton-proton chain process?

a)

Carbon

b)

Nitrogen

c)

Oxygen

d)

Hydrogen

11.

How does the atomic number determine an element's identity? It ________________

a)

indicates the number of protons in the nucleus.

b)

reflects the total number of electrons.

c)

is equal to the number of neutrons.

d)

depends on the atomic mass.

12.

Which fusion process is responsible for creating carbon from helium nuclei?

a)

Proton-proton chain reaction

b)

Triple alpha process

c)

Alpha ladder

d)

CNO cycle

13.

In the alpha ladder process, what element is formed when Hydrogen (4He) is added to Carbon (​12C)?

a)

16O

b)

20Ne

c)

24Mg

d)

28Si

14.

Which element is formed when three helium-4 nuclei combine in the triple-alpha process?

a)

Neon-20

b)

Nitrogen-14

c)

Oxygen-16

d)

Carbon-12

15.

What nuclear transformation process is happening when two or more nucleus of a light atom combine to form a heavy nucleus?

a)

fission

b)

fusion

c)

gamma radiation

d)

s-process

16.

Which particles are distributed in an electronic configuration?

a)

electrons

b)

neutrons

c)

proton

d)

quarks

17.

How will you describe the stability of a nuclei having 10 neutrons and 9 protons?

a)

heavy

b)

stable

c)

unstable

d)

an isotope

18.

What particles make up a nucleon?

a)

electron & proton

b)

electron & neutron

c)

proton & neutron

d)

none of the above

19.

How will you describe the stability of a nuclei having 10 neutrons and 9 protons?

a)

heavy

b)

stable

c)

unstable

d)

an isotope

20.

Which particle has an equal atomic weight to a He nuclei?

a)

alpha

b)

beta

c)

gamma

d)

microwave

21.

What is the correct chronological order of the synthesis of the following equations?

a)

I, II, III, IV

b)

I, III, IV, II

c)

III, I, II, IV

d)

IV, III, II, I

22.

How many valence electrons are present given the electronic configuration: 1s22s22p63s23p1 ?

a)

3

b)

6

c)

8

d)

10

23.

What is the daughter element in the nuclear transformation of 218Po → 4He + __?

a)

214Pb

b)

216Po

c)

222Rn

d)

220Ra

24.

Which could be the reason that fusion in the stars stops once iron is produced? Elements beyond iron are ____________________.

a)

heavier

b)

heavier and requires more protons to be fused

c)

heavier that it requires a high temperature to produce them

d)

All of the above.

25.

What is the state of 204Pb82?

a)

neutral

b)

reactive

c)

stable

d)

unstable

26.

Given the electronegativity values: Q=0.8; R=1.0; S=3.0 and T=3.4, which pair of atoms has the highest tendency to be nonpolar?

a)

Q&S

b)

R&T

c)

R&S

d)

S&T

27.

Which pair of elements would create an ionic bond?

a)

Na & Na

b)

Na & Cl

c)

Cl & Cl

d)

Cl & O

28.

How does a sodium ion differ from a sodium atom?

a)

The ion has more protons than the atom.

b)

In an ion there are more electrons than an atom.

c)

A sodium ion tends to attract negative ions than atoms.

d)

There is more tendency for sodium ions to attract positive ions than atoms.

29.

How many lone pairs do you have in a water (H2O) molecule?

a)

two

b)

none

c)

one

d)

three

30.

What type of chemical bond is present in water (H2O)?

a)

chemical

b)

covalent

c)

ionic

d)

metallic

31.

What type of bond involves the transfer of electrons between atoms?

a)

Covalent

b)

Metallic

c)

Hydrogen

d)

Ionic

32.

What is the distribution of electrical charge over the atoms joined by a bond?

a)

bonding

b)

molecularity

c)

polarity

d)

shaping

33.

What is identified as the atom's ability to attract electrons toward itself?

a)

valence

b)

electronegativity

c)

bond

d)

shape

34.

Which of the following bonds is formed by sharing electrons unequally?

a)

Ionic

b)

Metallic

c)

Polar Covalent

d)

Nonpolar Covalent

35.

What is identified as the atom's ability to have poles or a positive end and a negative end leading to have a dipole moment in a molecule?

a)

bonding

b)

molecularity

c)

polarity

d)

electronegativity

36.

What affects the polarity of a molecule?

a)

electrical distribution

b)

shape of the molecule

c)

electronegative difference

d)

all of these

37.

What kind of molecule has opposite charged ends?

a)

covalent

b)

dipole

c)

nonpolar

d)

polar

38.

What is the bond that holds atoms together in a compound?

a)

atomic bond

b)

chemical bond

c)

molecular bond

d)

all of these

39.

Where is a valence electron found? A valence electron is found in the ______ of an atom.

a)

electron cloud

b)

outermost shell

c)

inner most shell

d)

centermost shell

40.

A bond is formed between two chlorine (Cl) atoms. Using electronegativity difference, what is the type of bond formed?

a)

Ionic Bond

b)

Metallic Bond

c)

Polar Covalent Bond

d)

Nonpolar Covalent Bond

41.

What type of chemical bonds holds atom together if the electronegative difference is 1.8 and above?

a)

chemical

b)

covalent

c)

ionic

d)

none of these

42.

What is the order of elements in decreasing electronegativity for the following: Rb, Cl, Ca, Ga?

a)

Cl > Ga > Ca > Rb

b)

Cl > Ca > Ga > Rb

c)

Ga > Cl > Ca > Rb

d)

Rb > Ca > Ga > Cl

43.

Which of the following molecules is nonpolar because of its symmetrical structure?

a)

NH3

b)

H2O

c)

CH4

d)

SO2

44.

Why are lone pairs considered in predicting molecular geometry? They ____________

a)

are closer to the nucleus than bond pairs.

b)

occupy more volume than bond pairs.

c)

don't affect bond angles.

d)

form strong bonds.

45.

Which of the following intermolecular forces exist between polar molecules?

a)

dispersion forces

b)

hydrogen bonding

c)

ion-dipole interaction

d)

dipole-dipole interaction

46.

Which of the following force of interaction exist between H with other molecules having F, O and N?

a)

dispersion forces

b)

hydrogen bonding

c)

ion-dipole interaction

d)

dipole-dipole interaction

47.

Which of the following intermolecular forces of attraction (IMFA) is arranged from strongest to weakest?

a)

H- bonding - dipole-dipole - London dispersion forces

b)

London-forces - dipole-dipole - H-bonding

c)

Dipole-dipole - London forces - H- bonding

d)

H-bonding - London forces - dipole-dipole

48.

Which of the following intermolecular forces is the weakest?

a)

London forces

b)

hydrogen bonding

c)

ion-dipole interaction

d)

dipole-dipole interaction

49.

Which of the following is NOT an intermolecular force of attraction?

a)

covalent bond

b)

hydrogen bonding

c)

dispersion forces

d)

dipole-dipole interaction

50.

What is the key difference between intermolecular and intramolecular forces?

a)

Intramolecular forces hold atoms together within a molecule, while intermolecular forces exist between molecules and influence physical properties.

b)

Intermolecular forces exist within a molecule, while intramolecular forces exist between molecules.

c)

Intermolecular forces determine the chemical reactivity of a substance.

d)

Intramolecular forces are weaker than intermolecular forces.