Atoms Structure

An element with electronic configuration of 2,8,5 has

• 15 protons

• 2 electrons

• 2 electron shells

• 8 valence electrons

Tags

NGSS.MS-PS1-1

An element with 6 electrons has:

• 6 electron shells

• 4 valence electrons

• 6 valence electrons

• 2 valence electrons

Electronegativity is largely controlled by the electrons in the element’s outer shell

• True

• False

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Carbon and Oxygen are in the same period so it means:

• They react with other elements in the same way

• They have the same number of valence electrons

• They have the same number of electron shells

• They are both metals

Which has a NEGATIVE charge?

• proton

• electron

• neutron

• atom

Which are found in the nucleus?

• protons and electrons

• electrons and neutrons

• protons and neutrons

• protons, electrons and neutrons

Which are found outside the nucleus?

• electrons

• protons

• neutrons

• mutrons

Which represents a neutral atom?

• number of protons = number of electrons

• number of protons + neutrons = number of electrons

• number of neutrons = number of electrons

• number of protons = number of neutrons

What is a negative ion?

• number of electrons greater than number of protons

• number of electrons less than number of protons

• number of electrons greater than number of neutrons

• number of electrons less than number of neutrons

What is a positive ion?

• number of electrons less than number of protons

• number of electrons greater than number of protons

• number of electrons greater than number of neutrons

• number of electrons less than number of neutrons