saniya chemistry 4,5

The outermost shell of an atom is called the ______ shell.

• covalent

• valence

• exterior

• structural

Every atom tries to attain an _____ configuration to become stable.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In ionic bonding, atoms of metals lose their outer electrons to become ______ ions.

Tags

NGSS.MS-PS1-5

State whether True or False. Protons and Neutrons are never lost or gained during chemical reactions.

• True

• False

Tags

NGSS.HS-PS1-7

Draw the ions in their appropriate places in this image of covalent bonding in a water molecule.

Which 2 of these elements normally exist as diatomic molecules?

• Helium

• Carbon

• Hydrogen

• Oxygen

Apart from _______, all noble gases have eight electrons in their outer shell.

• Hydrogen

• Argon

• Neon

• Helium

The positive and negative ions in sodium chloride are held together by the _________ attraction between opposite charges.

Tags

NGSS.MS-PS2-5

Non-metals plus non-metal compounds are held together by _______ bonding.

In covalent compounds, bonds are made by ______ electrons between atoms.