IB Chem S1.2 Nuclear atom

Which is a correct statement about the relative mass and charge of a sub-atomic particle?

• A neutron has a relative mass of 1 and a relative charge of 0.

• An electron has a relative mass of 0 and a relative charge of +1.

• An electron has a relative mass of 1 and a relative charge of -1.

• An proton has a relative mass of 0 and a relative charge of +1.

• I and III only

• I and II only

• I, II and III

• II and III only

Tags

NGSS.MS-PS1-1

• It contains 20 electrons.

• It contains 19 electrons.

• It contains 20 protons.

• It contains 20 neutrons.

Tags

NGSS.HS-PS1-1

• I, II and III

• I and II only

• II and III only

• I and III only

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Boron has a relative atomic mass of 10.81. There are two stable isotopes of boron, boron-10 and boron -11. What is the abundance of boron-10 in naturally occurring boron?

• 81.3%

• 19.0%

• 81.7%

• 8.10%

The mass spectrum of an element shows two peaks at 191 and 193 with relative abundances of 38.5% and 61.5% respectively. What is the relative atomic mass of the element?

• 192.50

• 192.23

• 192.00

• 191.77

• 87.62

• 87.76

• 87.81

• 87.29

• I, II and III

• II and III only

• I and III only

• I and II only

Tags

NGSS.HS-PS1-8