Matter and Chemical formulae class 7

What is the meaning of metaloids

The arrow symbol in a chemical equation indicates the _______ of the chemical reaction.

_________is anything that has mass and occupies space.

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

The atomicity of ozone is -

• 0

• 1

• 3

• 2

Identify the element from the symbol

K

• Aluminum

• Potassium

• Magnesium

• Calcium

Valency of all noble gases are

• 0

• 1

• 2

• 3

what element has the atomic number of 9

• Neon

• Hydrogen

• Flourine

• Chlorine

Where are protons located in the atom?

• orbitals
• nucleus
• rings
• positive

Where are neutrons located in the atom?

• shells/orbitals
• rings
• center
• nucleus