Chemical Change
Is frying a egg a physical or chemical change?
Chemical
Is melting butter a physical or chemical change?
Physical change
What is the symbol for hydrogen on the periodic table?
The symbol is H.
When is my birthday?
November 9th 2012
When is my birthday?
May 29th 2012
What is it called when an acid reacts with a base?
This is called a neutralization reaction.
What happens to the water when it evaporates and why is this a physical change?
When water evaporates, it changes from a liquid to a gas. This is a physical change because the water remains the same substance, just in a different state.
What is the symbol for nitrogen on the periodic table?
The symbol is N.
How many siblings do I have? What are their names?
2; Lauren and Naomi
How many siblings do I have? What are their names?
3; Gabriella, Arianna, Nathan
When a piece of paper is burned, what type of chemical change occurs, and what are the products of the reaction?
When paper burns, a combustion reaction occurs, producing carbon dioxide (COâ‚‚), water vapor (Hâ‚‚O), and ash.
Why is ice melting in water considered a physical change?
When ice melts into water, it’s a physical change because the substance stays the same, just changing from solid to liquid. The molecules gain energy and move faster, but no new substance is created.
What are the 3 most important elements on the periodic table?
Carbon, oxygen, hydrogen
What is my favorite color and what shade?
Navy blue
What is my favorite color at what shade?
Navy blue
When baking soda mixes with vinegar a chemical reaction occurs. This is a acid-base reaction where the acid (vinegar) reacts with the base (baking soda). The reaction produces carbon dioxide which creates the bubbles and fizzing and the water and sodium acetate.
A glass bottle filled with water is placed in a freezer overnight. The next morning the water in the bottle was frozen. Why did it undergo physical change and not chemical change?
The water occurred physical change and not chemical change because the substance is still the same just in a different state.
Metals are shiny, conduct heat and electricity good, and are found on the left side of the periodic table. Nonmetals are dull, poor conductors, and brittle, located on the right side of the table. Metalloids have properties in between metals and nonmetals, and can conduct electricity, found along the zig-zag line between metals and nonmetals.
What are both of my parents name?
Lana (Sveta), and Steve (Slavic)
What are both of my parents names?
Daniel, and Tatyana
A shiny iron nail is left outside for several weeks and develops a reddish-brown coating. Why is this a chemical change?
A new substance (rust) is formed with different properties than iron.
A metal rod is heated at one end and after some time the other end also becomes warm. Why is it undergoing a physical change? Does the mass of the rod change? Why or why not? (:
The metal rod undergoes a physical change because it is being heated. The mass of the rod does not change because heating the rod only increases the energy of it’s particles and no matter has been added or removed.
How is the periodic table arranged?
The periodic table is arranged by increasing atomic number which is the number of protons in an atom. Elements in the same column (group) have similar properties, while rows (periods) show how their energy levels increase. It also separates elements into metals, nonmetals, and metalloids based on their characteristics.
How many hobbies and sports that I ever done and what are they?
6 sports/hobbies; soccer ,tennis ,jiu jitsu, gymnastics, piano, basketball
How old was I when my little brother was born?
5 years old.