Nuclear physics test

How many protons, neutrons and nucleons are in the  $\frac{45}{20}$  Ca isotope?

• 25, 20, 45

• 20, 25, 45

• 20, 45, 65

• 45, 20, 25

Tags

NGSS.HS-PS1-8

An atom of molybdenum  $\frac{95}{42}$  Mo has in its nucleus

• 42 protons only

• 53 protons, 42 neutrons

• 42 protons, 42 neutrons

• 42 protons, 53 neutrons

• 95 protons, 42 neutrons

Tags

NGSS.MS-PS1-1

Which of these atoms is definitely radioactive?

• $\frac{24}{12}$ Mg

• $\frac{59}{27}$ Co

• $\frac{195}{78}$ Pt

• $\frac{210}{84}$ Po

Tags

NGSS.HS-PS1-8

An alpha particle consists of

• 2 protons and 2 electrons

• 4 protons

• 2 protons and 2 neutrons

• 2 neutrons and 2 electrons

Certain atoms emit gamma radiation because

• they have a large nucleon number

• their nuclei emit electrons

• their nuclei contain protons and neutrons

• their nuclei are unstable

Tags

NGSS.HS-PS1-8

The radiation which is the least powerful ioniser is?

• gamma rays

• neutrons

• alpha particles

• beta particles

Which one of the following best describes the relative speeds at which alpha, beta, and gamma particles travel after being emitted from radioisotopes?

• Alpha is the slowest, beta then gamma

• Beta is the slowest, gamma then alpha

• Gamma is the slowest, alpha then beta

• Gamma is the slowest, beta then alpha

Which particle is the building block for protons and neutrons?

• quarks

• neutrinos

• bosons

• muons

Strontium-90 decays by radioactive emission to form yttrium-90. The equation is  $\frac{90}{38}$ Sr  $\rightarrow$  $\frac{90}{39}$ Y + X + γ, the atomic and mass numbers for X are  

• 1,1

• 0,0

• -1,0

• 0,-1

Tags

NGSS.HS-PS1-8

When tellurium-130 (  $\frac{130}{52}$ Te) is bombarded with neutrons (inside the core of a nuclear reactor) it forms a very unstable tellurium-131 and a gamma ray. The equation for this process is

•   $\frac{130}{52}$  Te  $\rightarrow$  $\frac{131}{52}$ Te +  $\frac{1}{0}$  n + γ

•   $\frac{130}{52}$  Te  $\rightarrow$  $\frac{132}{52}$ Te + 2 $\frac{1}{0}$  n + γ

•   $\frac{130}{52}$  Te +  $\frac{1}{0}$  n   $\rightarrow$  $\frac{131}{52}$ Te + γ

•   $\frac{130}{52}$  Te +2 $\frac{1}{0}$  n   $\rightarrow$  $\frac{132}{52}$ Te + γ

Tags

NGSS.HS-PS1-8