Atomic structure/periodic table

What do the columns of the Periodic Table show?

• The number of shells in the element

• The number of electrons in the outer shells

• The reactivity of the element

• The atomic number

Nitrogen has a(n) ___ of 7 and a(n) ___ of 14

• Atomic number, relative atomic mass

• Period , atomic number

• Relative atomic mass, atomic number

• Group, atomic number

Why do some elements have rounded atomic numbers?

• They have isotopes

• They have isomers

The nucleus of an element is surrounded by ___

• Protons

• Neutrons

• Electrons

• Particles

What do the rows of the perodic table show?

• The number of outer shells in the element

• The number of outer shells containing an electron in an element

• The number of electrons in the outer shell

• The total number of electrons present

80% of Boron is Boron-11 and 20% of Boron is Boron-10. Calculate the relative atomic mass of Boron to one dp.

• 17.1

• 10.2

• 10.8

• 11

Tags

NGSS.MS-PS1-1

the mass of an electron is —, a proton has a mass of —, and a neutron has a mass of —

• 2000,1,1

• -1,+1,0

• 1/1000, 1, 1

• 1,2000,2000

the higher the period number, the — electrons there are

• Fewer

• More

The charge of an elements ion depends on its —

• Group number

• Period number

one group where the charge is not dependent on a group number is the —

• Halogens

• Earth metals

• Transition metals

• Noble gases