NAS G9 Science Unit 2 Test

What is an atom?

什么是atom?

• Smallest unit of matter

• Smallest cell in the human body

• A microorganism

• Energy

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What is the name of the blue spheres?

蓝色球体叫什么名字？

• Electron

• Proton

• Cation

• Neutron

Tags

NGSS.MS-PS1-1

What is the name of the red spheres? They have a positive (+) charge.

红色球体叫什么名字？他们有一个 positive (+) charge。

• Electron

• Proton

• Cation

• Neutron

Tags

NGSS.MS-PS1-1

What is the name of the green spheres? They have no (zero) charge.

红色球体叫什么名字？他们没有一个 charge (0)。

• Electron

• Proton

• Cation

• Neutron

Tags

NGSS.MS-PS1-1

What is the name of the blue arcs?

蓝色弧线叫什么名字？

• Ions

• Anions

• Cations

• Electron shells

Is this the best model to explain how bonds form?

If yes, mention the name of a better model we learnt for describing how bonds form.

这是解释bonds如何形成的最佳模型吗？

如果是，请提及我们学习的用于描述bonds如何形成的更好模型的名称。

Tags

NGSS.HS-PS1-1

Which of these are ionic compounds? (1 or more answers)

哪些是ionic compounds？（1个或多个答案）

• MgCl₂

• Cl₂

• Br₂

• HCl

Which of these are covalent compounds? (1 or more answers)

哪些是covalent compounds？（1个或多个答案）

• MgCl₂

• Cl₂

• Br₂

• HCl

Electrical charge is a __________ of sub-atomic particles like the proton, neutron, and electron. They can be __________ or __________ .

Choose the correct alternative to fill in the blanks.

Electrical charge 是一个 sub-atomic particles的 __________ 正如 proton, neutron, 和 electron. 它们可以是__________ 或 __________ .

选择正确的替代项来填充空白。

• property; negative; positive

• atom; ion; anion

• ion; cation; anion

• chemical reaction; bond; covalent

Tags

NGSS.MS-PS2-3

Draw a cross-and-dot diagram for the chemical reaction below:

Na + Cl -> NaCl

Make the drawing on a separate sheet of paper (blank), take a photo, and upload it to Firefly.

在另一张纸（空白）上绘制绘图，拍照并将其上传到Firefly。

• OK, 我做了

• 没有我不想做这个

Tags

NGSS.MS-PS1-1