Matter and chemical formulae revision

what element has the atomic number of 9

• Neon

• Hydrogen

• Flourine

• Chlorine

Identify the element from the symbol

K

• Aluminum

• Potassium

• Magnesium

• Calcium

Which of the following are properties of compounds?

• Same properties as constituents

• Combined physically

• It’s a mixture

• Fixed ratio

Molecule is the smallest unit of _______

• Element

• Matter

• Compounds

• Atoms

Tags

NGSS.MS-PS1-1

The number of protons are equal to the number of ________ in an atom

• Neutrons

• Shell

• Electron

• Nucleus

What 2 elements are there in

• Potassium and oxygen

• Chlorine and oxygen

• Potassium and nitrogen

• Carbon and oxygen

Tags

NGSS.MS-PS1-1

Atomicity is

• Number of protons in an atom

• Number of electrons in an atom

• Number of nuclear in an atom

• Number of shells in an atom

Tags

NGSS.MS-PS1-1

What is the meaning of metaloids

Which of the following are characteristics of heterogeneous mixtures

• Constituents are evenly spread

• Ex:salt and water

• Constituents are not evenly spread

• Ex:sugar water